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solve each system using elimination
x-3y=27
3x-3y=39
Divide the problem into 3 steps. 1.Eliminate one variable. 2. Solve for the remaining variable. 3. Use that information to solve for the second variable. 1. Multiply the top equation by -3 -3x+9y=-81 3x-3y=39 If you add these two equations together, you are left with 6y=-42 2. Solve for y by dividing both sides by 6 y=-7 3. Plug -7 in for y in the either equation. I'll use the top one. It's just simpler. x-3(-7)=27 x=6
Check your work plugging both variables into both equations to see if they are still true.
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