-20=4(z-1)

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Solution for -20=4(z-1) equation:


-20=4(z-1)

We simplify the equation to the form, which is simple to understand 
-20=4(z-1)

Reorder the terms in parentheses
-20=+(+4z-4)

Remove unnecessary parentheses
-20=+4z-4

We move all terms containing z to the left and all other terms to the right. 
-4z=-4+20

We simplify left and right side of the equation. 
-4z=+16

We divide both sides of the equation by -04 to get z. 
z=-4

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