43=4u+15

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Solution for 43=4u+15 equation:


Simplifying
43 = 4u + 15

Reorder the terms:
43 = 15 + 4u

Solving
43 = 15 + 4u

Solving for variable 'u'.

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

Add '-4u' to each side of the equation.
43 + -4u = 15 + 4u + -4u

Combine like terms: 4u + -4u = 0
43 + -4u = 15 + 0
43 + -4u = 15

Add '-43' to each side of the equation.
43 + -43 + -4u = 15 + -43

Combine like terms: 43 + -43 = 0
0 + -4u = 15 + -43
-4u = 15 + -43

Combine like terms: 15 + -43 = -28
-4u = -28

Divide each side by '-4'.
u = 7

Simplifying
u = 7

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