21u+85=46u-65

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Solution for 21u+85=46u-65 equation:


Simplifying
21u + 85 = 46u + -65

Reorder the terms:
85 + 21u = 46u + -65

Reorder the terms:
85 + 21u = -65 + 46u

Solving
85 + 21u = -65 + 46u

Solving for variable 'u'.

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

Add '-46u' to each side of the equation.
85 + 21u + -46u = -65 + 46u + -46u

Combine like terms: 21u + -46u = -25u
85 + -25u = -65 + 46u + -46u

Combine like terms: 46u + -46u = 0
85 + -25u = -65 + 0
85 + -25u = -65

Add '-85' to each side of the equation.
85 + -85 + -25u = -65 + -85

Combine like terms: 85 + -85 = 0
0 + -25u = -65 + -85
-25u = -65 + -85

Combine like terms: -65 + -85 = -150
-25u = -150

Divide each side by '-25'.
u = 6

Simplifying
u = 6

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