2(4v-5)=21

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Solution for 2(4v-5)=21 equation: 


Simplifying
2(4v + -5) = 21

Reorder the terms:
2(-5 + 4v) = 21
(-5 * 2 + 4v * 2) = 21
(-10 + 8v) = 21

Solving
-10 + 8v = 21

Solving for variable 'v'.

Move all terms containing v to the left, all other terms to the right.

Add '10' to each side of the equation.
-10 + 10 + 8v = 21 + 10

Combine like terms: -10 + 10 = 0
0 + 8v = 21 + 10
8v = 21 + 10

Combine like terms: 21 + 10 = 31
8v = 31

Divide each side by '8'.
v = 3.875

Simplifying
v = 3.875

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