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7v+4-9=-28
We simplify the equation to the form, which is simple to understand
7v+4-9=-28
We move all terms containing v to the left and all other terms to the right.
+7v=-28-4+9
We simplify left and right side of the equation.
+7v=-23
We divide both sides of the equation by 7 to get v.
v=-3.2857142857143
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