Solving Systems of Linear Equasions

Using The Addition Method

Final solution:

Step 1: Solve for the first variable

(Here, we solved for y, the answer we got was y = -2x + 5)

Step 2: Solve for the second variable

(Here, we solved for x by substituting y for -2x +5)

Step 3: Write the solution

(This is our current solution, now we will substitute 18 for x in the equation used for y. After doing the math, we should end up with -31)

Step 4: Check and plug in

(Here, we plug in 18 for all the x's and -31 for all the y's)