8u+5=7u-21

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Solution for 8u+5=7u-21 equation:


Simplifying
8u + 5 = 7u + -21

Reorder the terms:
5 + 8u = 7u + -21

Reorder the terms:
5 + 8u = -21 + 7u

Solving
5 + 8u = -21 + 7u

Solving for variable 'u'.

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

Add '-7u' to each side of the equation.
5 + 8u + -7u = -21 + 7u + -7u

Combine like terms: 8u + -7u = 1u
5 + 1u = -21 + 7u + -7u

Combine like terms: 7u + -7u = 0
5 + 1u = -21 + 0
5 + 1u = -21

Add '-5' to each side of the equation.
5 + -5 + 1u = -21 + -5

Combine like terms: 5 + -5 = 0
0 + 1u = -21 + -5
1u = -21 + -5

Combine like terms: -21 + -5 = -26
1u = -26

Divide each side by '1'.
u = -26

Simplifying
u = -26

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