5u+8(u-7)=9

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Solution for 5u+8(u-7)=9 equation:


Simplifying
5u + 8(u + -7) = 9

Reorder the terms:
5u + 8(-7 + u) = 9
5u + (-7 * 8 + u * 8) = 9
5u + (-56 + 8u) = 9

Reorder the terms:
-56 + 5u + 8u = 9

Combine like terms: 5u + 8u = 13u
-56 + 13u = 9

Solving
-56 + 13u = 9

Solving for variable 'u'.

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

Add '56' to each side of the equation.
-56 + 56 + 13u = 9 + 56

Combine like terms: -56 + 56 = 0
0 + 13u = 9 + 56
13u = 9 + 56

Combine like terms: 9 + 56 = 65
13u = 65

Divide each side by '13'.
u = 5

Simplifying
u = 5

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