3b-7=15

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Solution for 3b-7=15 equation: 


Simplifying
3b + -7 = 15

Reorder the terms:
-7 + 3b = 15

Solving
-7 + 3b = 15

Solving for variable 'b'.

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

Add '7' to each side of the equation.
-7 + 7 + 3b = 15 + 7

Combine like terms: -7 + 7 = 0
0 + 3b = 15 + 7
3b = 15 + 7

Combine like terms: 15 + 7 = 22
3b = 22

Divide each side by '3'.
b = 7.333333333

Simplifying
b = 7.333333333

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