45=3(3-4b)

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Solution for 45=3(3-4b) equation:


Simplifying
45 = 3(3 + -4b)
45 = (3 * 3 + -4b * 3)
45 = (9 + -12b)

Solving
45 = 9 + -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.
45 + 12b = 9 + -12b + 12b

Combine like terms: -12b + 12b = 0
45 + 12b = 9 + 0
45 + 12b = 9

Add '-45' to each side of the equation.
45 + -45 + 12b = 9 + -45

Combine like terms: 45 + -45 = 0
0 + 12b = 9 + -45
12b = 9 + -45

Combine like terms: 9 + -45 = -36
12b = -36

Divide each side by '12'.
b = -3

Simplifying
b = -3

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