Question

7x + 2y=24
8x + 2y=30

Answer 1

x=6 y=-9

Explanation:

• Layer the equations on each other as you would in a subtraction problem:

8x + 2y=30

7x + 2y=24

• Subtract the equation just like you would normally. This should leave 1x=6 or x=6.
• Now that you have your x value, plug it in as x for one of the equations. For the 2nd equation, this leaves:

42+2y=24 then

2y=-18 then

y=-9

• Double check your y value by plugging x=6 into the first equation. This should also leave y=-9.