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

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

Simplifying
7b + 3 + -4b = 3 + -3(-1b + 4)

Reorder the terms:
3 + 7b + -4b = 3 + -3(-1b + 4)

Combine like terms: 7b + -4b = 3b
3 + 3b = 3 + -3(-1b + 4)

Reorder the terms:
3 + 3b = 3 + -3(4 + -1b)
3 + 3b = 3 + (4 * -3 + -1b * -3)
3 + 3b = 3 + (-12 + 3b)

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

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

Combine like terms: 3b + -3b = 0
3 + 0 = -9 + 3b + -3b
3 = -9 + 3b + -3b

Combine like terms: 3b + -3b = 0
3 = -9 + 0
3 = -9

Solving
3 = -9

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.