-120=3b+3(5b-10)

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Solution for -120=3b+3(5b-10) equation:


Simplifying
-120 = 3b + 3(5b + -10)

Reorder the terms:
-120 = 3b + 3(-10 + 5b)
-120 = 3b + (-10 * 3 + 5b * 3)
-120 = 3b + (-30 + 15b)

Reorder the terms:
-120 = -30 + 3b + 15b

Combine like terms: 3b + 15b = 18b
-120 = -30 + 18b

Solving
-120 = -30 + 18b

Solving for variable 'b'.

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

Add '-18b' to each side of the equation.
-120 + -18b = -30 + 18b + -18b

Combine like terms: 18b + -18b = 0
-120 + -18b = -30 + 0
-120 + -18b = -30

Add '120' to each side of the equation.
-120 + 120 + -18b = -30 + 120

Combine like terms: -120 + 120 = 0
0 + -18b = -30 + 120
-18b = -30 + 120

Combine like terms: -30 + 120 = 90
-18b = 90

Divide each side by '-18'.
b = -5

Simplifying
b = -5

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