3(u-7)+5(u-4)=15

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Solution for 3(u-7)+5(u-4)=15 equation:


Simplifying
3(u + -7) + 5(u + -4) = 15

Reorder the terms:
3(-7 + u) + 5(u + -4) = 15
(-7 * 3 + u * 3) + 5(u + -4) = 15
(-21 + 3u) + 5(u + -4) = 15

Reorder the terms:
-21 + 3u + 5(-4 + u) = 15
-21 + 3u + (-4 * 5 + u * 5) = 15
-21 + 3u + (-20 + 5u) = 15

Reorder the terms:
-21 + -20 + 3u + 5u = 15

Combine like terms: -21 + -20 = -41
-41 + 3u + 5u = 15

Combine like terms: 3u + 5u = 8u
-41 + 8u = 15

Solving
-41 + 8u = 15

Solving for variable 'u'.

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

Add '41' to each side of the equation.
-41 + 41 + 8u = 15 + 41

Combine like terms: -41 + 41 = 0
0 + 8u = 15 + 41
8u = 15 + 41

Combine like terms: 15 + 41 = 56
8u = 56

Divide each side by '8'.
u = 7

Simplifying
u = 7

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