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

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


Simplifying
-3b + 9 = -3 + -3(4 + -7b)

Reorder the terms:
9 + -3b = -3 + -3(4 + -7b)
9 + -3b = -3 + (4 * -3 + -7b * -3)
9 + -3b = -3 + (-12 + 21b)

Combine like terms: -3 + -12 = -15
9 + -3b = -15 + 21b

Solving
9 + -3b = -15 + 21b

Solving for variable 'b'.

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

Add '-21b' to each side of the equation.
9 + -3b + -21b = -15 + 21b + -21b

Combine like terms: -3b + -21b = -24b
9 + -24b = -15 + 21b + -21b

Combine like terms: 21b + -21b = 0
9 + -24b = -15 + 0
9 + -24b = -15

Add '-9' to each side of the equation.
9 + -9 + -24b = -15 + -9

Combine like terms: 9 + -9 = 0
0 + -24b = -15 + -9
-24b = -15 + -9

Combine like terms: -15 + -9 = -24
-24b = -24

Divide each side by '-24'.
b = 1

Simplifying
b = 1

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