21-8(u-3)+3+7u=

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Solution for 21-8(u-3)+3+7u= equation:


Simplifying
21 + -8(u + -3) + 3 + 7u = 0

Reorder the terms:
21 + -8(-3 + u) + 3 + 7u = 0
21 + (-3 * -8 + u * -8) + 3 + 7u = 0
21 + (24 + -8u) + 3 + 7u = 0

Reorder the terms:
21 + 24 + 3 + -8u + 7u = 0

Combine like terms: 21 + 24 = 45
45 + 3 + -8u + 7u = 0

Combine like terms: 45 + 3 = 48
48 + -8u + 7u = 0

Combine like terms: -8u + 7u = -1u
48 + -1u = 0

Solving
48 + -1u = 0

Solving for variable 'u'.

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

Add '-48' to each side of the equation.
48 + -48 + -1u = 0 + -48

Combine like terms: 48 + -48 = 0
0 + -1u = 0 + -48
-1u = 0 + -48

Combine like terms: 0 + -48 = -48
-1u = -48

Divide each side by '-1'.
u = 48

Simplifying
u = 48

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