7(3b+5)-4(2b-9)=

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Solution for 7(3b+5)-4(2b-9)= equation:


Simplifying
7(3b + 5) + -4(2b + -9) = 0

Reorder the terms:
7(5 + 3b) + -4(2b + -9) = 0
(5 * 7 + 3b * 7) + -4(2b + -9) = 0
(35 + 21b) + -4(2b + -9) = 0

Reorder the terms:
35 + 21b + -4(-9 + 2b) = 0
35 + 21b + (-9 * -4 + 2b * -4) = 0
35 + 21b + (36 + -8b) = 0

Reorder the terms:
35 + 36 + 21b + -8b = 0

Combine like terms: 35 + 36 = 71
71 + 21b + -8b = 0

Combine like terms: 21b + -8b = 13b
71 + 13b = 0

Solving
71 + 13b = 0

Solving for variable 'b'.

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

Add '-71' to each side of the equation.
71 + -71 + 13b = 0 + -71

Combine like terms: 71 + -71 = 0
0 + 13b = 0 + -71
13b = 0 + -71

Combine like terms: 0 + -71 = -71
13b = -71

Divide each side by '13'.
b = -5.461538462

Simplifying
b = -5.461538462

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