3u+40=7u

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Solution for 3u+40=7u equation:


Simplifying
3u + 40 = 7u

Reorder the terms:
40 + 3u = 7u

Solving
40 + 3u = 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.
40 + 3u + -7u = 7u + -7u

Combine like terms: 3u + -7u = -4u
40 + -4u = 7u + -7u

Combine like terms: 7u + -7u = 0
40 + -4u = 0

Add '-40' to each side of the equation.
40 + -40 + -4u = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -4u = 0 + -40
-4u = 0 + -40

Combine like terms: 0 + -40 = -40
-4u = -40

Divide each side by '-4'.
u = 10

Simplifying
u = 10

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