8u+1=7u-20

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Solution for 8u+1=7u-20 equation:


Simplifying
8u + 1 = 7u + -20

Reorder the terms:
1 + 8u = 7u + -20

Reorder the terms:
1 + 8u = -20 + 7u

Solving
1 + 8u = -20 + 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.
1 + 8u + -7u = -20 + 7u + -7u

Combine like terms: 8u + -7u = 1u
1 + 1u = -20 + 7u + -7u

Combine like terms: 7u + -7u = 0
1 + 1u = -20 + 0
1 + 1u = -20

Add '-1' to each side of the equation.
1 + -1 + 1u = -20 + -1

Combine like terms: 1 + -1 = 0
0 + 1u = -20 + -1
1u = -20 + -1

Combine like terms: -20 + -1 = -21
1u = -21

Divide each side by '1'.
u = -21

Simplifying
u = -21

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