Addition/Subtration Methods for Algebra
Solve the following equation by using the addition/subtraction method. The numbers are x = 2 and y = 7
Step 1: Write both equations in the form ax + by = c
Step 2: Multiply the second equation by 2 in order to make the coefficients of the x terms
Step 3: Subtract the second equation from the first equation to eliminate the x variable.
Step 4: Solve the equation for y.
Step 5: Select one equation and substitute 4 for y and solve for x.