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v/10-v/4=9/10
We simplify the equation to the form, which is simple to understand
v/10-v/4=9/10
We move all terms containing v to the left and all other terms to the right.
+ 0.1v-0.25v=0.9
We simplify left and right side of the equation.
-0.15v=0.9
We divide both sides of the equation by -0.15 to get v.
v=-6
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