20-2b=-3(4b-9)

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Solution for 20-2b=-3(4b-9) equation:


Simplifying
20 + -2b = -3(4b + -9)

Reorder the terms:
20 + -2b = -3(-9 + 4b)
20 + -2b = (-9 * -3 + 4b * -3)
20 + -2b = (27 + -12b)

Solving
20 + -2b = 27 + -12b

Solving for variable 'b'.

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

Add '12b' to each side of the equation.
20 + -2b + 12b = 27 + -12b + 12b

Combine like terms: -2b + 12b = 10b
20 + 10b = 27 + -12b + 12b

Combine like terms: -12b + 12b = 0
20 + 10b = 27 + 0
20 + 10b = 27

Add '-20' to each side of the equation.
20 + -20 + 10b = 27 + -20

Combine like terms: 20 + -20 = 0
0 + 10b = 27 + -20
10b = 27 + -20

Combine like terms: 27 + -20 = 7
10b = 7

Divide each side by '10'.
b = 0.7

Simplifying
b = 0.7

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