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Nutmeg
Mathematics
11 May, 18:49
7x + 2y=24
8x + 2y=30
+4
Answers (
1
)
Carlos Kirby
11 May, 19:13
0
x=6 y=-9
Step-by-step 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.
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