2b-4=b-7

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Solution for 2b-4=b-7 equation:


Simplifying
2b + -4 = b + -7

Reorder the terms:
-4 + 2b = b + -7

Reorder the terms:
-4 + 2b = -7 + b

Solving
-4 + 2b = -7 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
-4 + 2b + -1b = -7 + b + -1b

Combine like terms: 2b + -1b = 1b
-4 + 1b = -7 + b + -1b

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

Add '4' to each side of the equation.
-4 + 4 + 1b = -7 + 4

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

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

Divide each side by '1'.
b = -3

Simplifying
b = -3

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