42=1/2(z-4)

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Solution for 42=1/2(z-4) equation:


42=1/2(z-4)

We simplify the equation to the form, which is simple to understand 
42=1/2(z-4)

Reorder the terms in parentheses
42=+( + 0.5z-2)

Remove unnecessary parentheses
+42=0.5z-2

We move all terms containing z to the left and all other terms to the right. 
-0.5z=-2-42

We simplify left and right side of the equation. 
-0.5z=-44

We divide both sides of the equation by -00.5 to get z. 
z=88

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