40=15u-7u

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Solution for 40=15u-7u equation:


Simplifying
40 = 15u + -7u

Combine like terms: 15u + -7u = 8u
40 = 8u

Solving
40 = 8u

Solving for variable 'u'.

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

Add '-8u' to each side of the equation.
40 + -8u = 8u + -8u

Combine like terms: 8u + -8u = 0
40 + -8u = 0

Add '-40' to each side of the equation.
40 + -40 + -8u = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -8u = 0 + -40
-8u = 0 + -40

Combine like terms: 0 + -40 = -40
-8u = -40

Divide each side by '-8'.
u = 5

Simplifying
u = 5

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