2(u+-7)=-3u+21

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Solution for 2(u+-7)=-3u+21 equation: 


Simplifying
2(u + -7) = -3u + 21

Reorder the terms:
2(-7 + u) = -3u + 21
(-7 * 2 + u * 2) = -3u + 21
(-14 + 2u) = -3u + 21

Reorder the terms:
-14 + 2u = 21 + -3u

Solving
-14 + 2u = 21 + -3u

Solving for variable 'u'.

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

Add '3u' to each side of the equation.
-14 + 2u + 3u = 21 + -3u + 3u

Combine like terms: 2u + 3u = 5u
-14 + 5u = 21 + -3u + 3u

Combine like terms: -3u + 3u = 0
-14 + 5u = 21 + 0
-14 + 5u = 21

Add '14' to each side of the equation.
-14 + 14 + 5u = 21 + 14

Combine like terms: -14 + 14 = 0
0 + 5u = 21 + 14
5u = 21 + 14

Combine like terms: 21 + 14 = 35
5u = 35

Divide each side by '5'.
u = 7

Simplifying
u = 7

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