Solve x+2y=12 and 2x-y=4 algebraically

Let's solve for x.
x+2y=12Step 1: Add -2y to both sides.x+2y+−2y=12+−2yx=−2y+12x=−2y+12

Let's solve for y.x+2y=12Step 1: Add -x to both sides.x+2y+−x=12+−x2y=−x+12Step 2: Divide both sides by 2.2y2=−x+12/2y=−1/2x+6

Let's solve for x.2x−y=4Step 1: Add y to both sides.2x−y+y=4+y2x=y+4Step 2: Divide both sides by 2.2x/2=y+4/2x=1/2y+2

Let's solve for y.2x−y=4Step 1: Add -2x to both sides.2x−y+−2x=4+−2x−y=−2x+4Step 2: Divide both sides by -1.−y/−1=−2x+4/−1y=2x−4y=2x−4

25% increaseplus i think decrease i only know increase: ((