3=b-7

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Solution for 3=b-7 equation:


Simplifying
3 = b + -7

Reorder the terms:
3 = -7 + b

Solving
3 = -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.
3 + -1b = -7 + b + -1b

Combine like terms: b + -1b = 0
3 + -1b = -7 + 0
3 + -1b = -7

Add '-3' to each side of the equation.
3 + -3 + -1b = -7 + -3

Combine like terms: 3 + -3 = 0
0 + -1b = -7 + -3
-1b = -7 + -3

Combine like terms: -7 + -3 = -10
-1b = -10

Divide each side by '-1'.
b = 10

Simplifying
b = 10

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