I could have been named the "plugging back" method, but that did not stick. That is why it is called the substitution method. That is the substitution.Īnd then, you take the substitution and plug it into the other equation. What is meant by substitution method?įollowed: you need to find one substitution, which is obtained by using one of the equations to solve one variable in terms of the other one. One you have typed the two equations, our calculator will try to select the best variable to do the substitution, and the plug that substitution back into the other equation. These equations could be simplified or not, but as long as the equations are valid linear equations, it will work fine. With this calculator, all you have to do is to type your system by specifying Lots of people as about how do you solve a system of equations on a calculator, but it happens that all systems work differently. How do you do substitution on a calculator? "\(y = 2x + 3\)" where it is already solved for \(y\)Ģ) Now that you have solved for one variable in one of the equation, use that variable you solve for, and plug it in the other equation.ģ) This equation will be in terms of the other variable (not the one you original solved for), and then you will solve for it, and you will get a numeric result.Ĥ) With the numeric result found for the other variable, come back you the original variable you solve for, and plug in the Often times equations are given as for example "\(x = 2y + 3\)" where it is already solved for \(x\) or for example How do you solve system of equations by substitution?ġ) Choose one of the two equations, for which it is easy to solve for any \(x\) or \(y\), and solve for that variable, in terms of the other variable.
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