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x-13y+16
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x-13y+16
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2x-5y+9-x-8y-\left(-7\right)
To find the opposite of x+8y-7, find the opposite of each term.
2x-5y+9-x-8y+7
The opposite of -7 is 7.
x-5y+9-8y+7
Combine 2x and -x to get x.
x-13y+9+7
Combine -5y and -8y to get -13y.
x-13y+16
Add 9 and 7 to get 16.
2x-5y+9-x-8y-\left(-7\right)
To find the opposite of x+8y-7, find the opposite of each term.
2x-5y+9-x-8y+7
The opposite of -7 is 7.
x-5y+9-8y+7
Combine 2x and -x to get x.
x-13y+9+7
Combine -5y and -8y to get -13y.
x-13y+16
Add 9 and 7 to get 16.
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