12+7b=8(4+2b)-3(1+3b)

Solution for 12+7b=8(4+2b)-3(1+3b) equation:

Simplifying
12 + 7b = 8(4 + 2b) + -3(1 + 3b)
12 + 7b = (4 * 8 + 2b * 8) + -3(1 + 3b)
12 + 7b = (32 + 16b) + -3(1 + 3b)
12 + 7b = 32 + 16b + (1 * -3 + 3b * -3)
12 + 7b = 32 + 16b + (-3 + -9b)

Reorder the terms:
12 + 7b = 32 + -3 + 16b + -9b

Combine like terms: 32 + -3 = 29
12 + 7b = 29 + 16b + -9b

Combine like terms: 16b + -9b = 7b
12 + 7b = 29 + 7b

Add '-7b' to each side of the equation.
12 + 7b + -7b = 29 + 7b + -7b

Combine like terms: 7b + -7b = 0
12 + 0 = 29 + 7b + -7b
12 = 29 + 7b + -7b

Combine like terms: 7b + -7b = 0
12 = 29 + 0
12 = 29

Solving
12 = 29

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.