How do you use substitution to solve word problems?
To solve using substitution, follow these four steps: Step 1: Isolate a variable. Step 2: Plug the result of Step 1 into the other equation and solve for one variable. Step 3: Plug the result of Step 2 into one of the original equations and solve for the other variable.
How do I solve the system of equations?
To solve a system of equations using substitution:.
Isolate one of the two variables in one of the equations..
Substitute the expression that is equal to the isolated variable from Step 1 into the other equation. ... .
Solve the linear equation for the remaining variable..