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4z/10+8=-7
We simplify the equation to the form, which is simple to understand
4z/10+8=-7
We move all terms containing z to the left and all other terms to the right.
+ 0.4z=-7-8
We simplify left and right side of the equation.
+ 0.4z=-15
We divide both sides of the equation by 0.4 to get z.
z=-37.5
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