Solve for z
z = -\frac{35}{2} = -17\frac{1}{2} = -17.5
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4z+90=20
Multiply both sides of the equation by 10.
4z=20-90
Subtract 90 from both sides.
4z=-70
Subtract 90 from 20 to get -70.
z=\frac{-70}{4}
Divide both sides by 4.
z=-\frac{35}{2}
Reduce the fraction \frac{-70}{4} to lowest terms by extracting and canceling out 2.
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