Solve for x
x=-175
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x-\left(-90\right)+85=0
Multiply 18 and -5 to get -90.
x+90+85=0
The opposite of -90 is 90.
x+175=0
Add 90 and 85 to get 175.
x=-175
Subtract 175 from both sides. Anything subtracted from zero gives its negation.
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