Topic: Solving Systems Using Substitution
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How to Solve Systems of Equations Using Substitution
An equation is a mathematical statement that correlates the relationship between two expressions. In a system of equations, two or more equations are correlated. To solve a system of equations, you have to find the values of the variables i... Read More »
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How to Solve Systems by Substitution
A system of linear equations contains multiple equations, each with multiple variables, that can be solved together because they're correlated. In sets with two equations, each containing the variables "x" and "y", a technique called the su... Read More »
Source: http://www.ehow.com/how_8590111_solve-systems-substitution.html
How to Solve Systems of Equations by Substitution
Solve one equation for a single variable. This sounds hard, but is pretty easy. Let's use the system of equations X + Y = 2 2X -Y = 4 as an example. I am going to solve the first equation for X to get X = 2 - Y. This expression shows that X... Read More »
Source: http://www.ehow.com/how_5537018_solve-systems-equations-substitut...
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Answers to Other Common Questions
Solving systems of linear equations is a skill not only taught in basic algebra but also tested on the ACT and SAT exams and even job application tests."Solving a system" is fancy language for finding the values of x and y that will make tw...
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Source: http://www.ehow.com/how_4505808_solve-systems-linear-equations-su...
Solve one of the equations for one of the variables. Try to pick the equation where one of the variables can be easily solved for. If you look at -2x+y=3, just add -2x to both sides in order to solve for y. y=3+2x which I like to write as y...
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Source: http://www.ehow.com/how_4847206_solve-unknowns-using-substitution...
Suppose you have n linear equations in n unknown variables. Take any equation and rewrite it to make one of the variables the subject of the equation. That is, express that variable in terms of the other (n-1) variables. For example, x + 2y...
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Source: http://wiki.answers.com/Q/How_do_you_solve_a_linear_system_using_...
Algebraic equations with more than one unknown are difficult to solve. When you have more than one equation with the same unknowns, substituting values from one equation into the next is an easy way to solve one of the unknowns. Then you ca...
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Source: http://www.ehow.com/how_2251599_solve-simultaneous-equations-usin...
In one of the equations, solve for one of the variables. Then plug ... ...MORE...
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1 Name the equations, so a+2b= -4 (1) 2a+b= 1 (2) 2 Look at the simplest equation which is eqn (1) and make the variable with the lowest coefficient the subject of the formula . In eqn (1) a is the variable with the lowest coefficient. So f...
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Source: http://www.wikihow.com/Solve-Simultaneous-Equations-Using-Substit...
1 Get a two part equation . 2 Solve for a variable in one of the equations (preferably the easiest) . 3 Plug the variable in to other equation . 4 Simplify until you know what number the variable equals . 5 Plug this number back into any on...
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Source: http://www.wikihow.com/Use-the-Substitution-Method-to-Solve-an-Eq...
