HOW TO SOLVE AN EQUATION WITH SUBSTITUTION OF TWO VARIABLES

1. Replace each variable with the given number

2. Solve the equation following order of operations

Example: If x = 3 and y = 2 then find the value of 3x -2y

Replace each variable: 3(3) - 2(2)

Then solve 3x3=9 2x2=4 so 9-4=5