3b+5=4b-7

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Solution for 3b+5=4b-7 equation:


Simplifying
3b + 5 = 4b + -7

Reorder the terms:
5 + 3b = 4b + -7

Reorder the terms:
5 + 3b = -7 + 4b

Solving
5 + 3b = -7 + 4b

Solving for variable 'b'.

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

Add '-4b' to each side of the equation.
5 + 3b + -4b = -7 + 4b + -4b

Combine like terms: 3b + -4b = -1b
5 + -1b = -7 + 4b + -4b

Combine like terms: 4b + -4b = 0
5 + -1b = -7 + 0
5 + -1b = -7

Add '-5' to each side of the equation.
5 + -5 + -1b = -7 + -5

Combine like terms: 5 + -5 = 0
0 + -1b = -7 + -5
-1b = -7 + -5

Combine like terms: -7 + -5 = -12
-1b = -12

Divide each side by '-1'.
b = 12

Simplifying
b = 12

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