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21=11(1+11v)+10(1+3v)
We simplify the equation to the form, which is simple to understand
21=11(1+11v)+10(1+3v)
Reorder the terms in parentheses
21=+(+11+121v)+10*(1+3v)
Remove unnecessary parentheses
+21=+11+121v+10+*(+1+3v+)
Reorder the terms in parentheses
21=+11+121v+(+10+30v)
Remove unnecessary parentheses
+21=+11+121v+10+30v
We move all terms containing v to the left and all other terms to the right.
-121v-30v=+11+10-21
We simplify left and right side of the equation.
-151v=0
We divide both sides of the equation by -151 to get v.
v=-0
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