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280=-8(1+7v)+8
We simplify the equation to the form, which is simple to understand
280=-8(1+7v)+8
Reorder the terms in parentheses
280=+(-8-56v)+8
Remove unnecessary parentheses
+280=-8-56v+8
We move all terms containing v to the left and all other terms to the right.
+56v=-8+8-280
We simplify left and right side of the equation.
+56v=-280
We divide both sides of the equation by 056 to get v.
v=-5
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