-5(7+8z)=-28

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Solution for -5(7+8z)=-28 equation: 


Simplifying
-5(7 + 8z) = -28
(7 * -5 + 8z * -5) = -28
(-35 + -40z) = -28

Solving
-35 + -40z = -28

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '35' to each side of the equation.
-35 + 35 + -40z = -28 + 35

Combine like terms: -35 + 35 = 0
0 + -40z = -28 + 35
-40z = -28 + 35

Combine like terms: -28 + 35 = 7
-40z = 7

Divide each side by '-40'.
z = -0.175

Simplifying
z = -0.175

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