4(5u+3)-5(2u+1)=78

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Solution for 4(5u+3)-5(2u+1)=78 equation:


Simplifying
4(5u + 3) + -5(2u + 1) = 78

Reorder the terms:
4(3 + 5u) + -5(2u + 1) = 78
(3 * 4 + 5u * 4) + -5(2u + 1) = 78
(12 + 20u) + -5(2u + 1) = 78

Reorder the terms:
12 + 20u + -5(1 + 2u) = 78
12 + 20u + (1 * -5 + 2u * -5) = 78
12 + 20u + (-5 + -10u) = 78

Reorder the terms:
12 + -5 + 20u + -10u = 78

Combine like terms: 12 + -5 = 7
7 + 20u + -10u = 78

Combine like terms: 20u + -10u = 10u
7 + 10u = 78

Solving
7 + 10u = 78

Solving for variable 'u'.

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

Add '-7' to each side of the equation.
7 + -7 + 10u = 78 + -7

Combine like terms: 7 + -7 = 0
0 + 10u = 78 + -7
10u = 78 + -7

Combine like terms: 78 + -7 = 71
10u = 71

Divide each side by '10'.
u = 7.1

Simplifying
u = 7.1

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