7-12(3+b)=10

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Solution for 7-12(3+b)=10 equation: 


Simplifying
7 + -12(3 + b) = 10
7 + (3 * -12 + b * -12) = 10
7 + (-36 + -12b) = 10

Combine like terms: 7 + -36 = -29
-29 + -12b = 10

Solving
-29 + -12b = 10

Solving for variable 'b'.

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

Add '29' to each side of the equation.
-29 + 29 + -12b = 10 + 29

Combine like terms: -29 + 29 = 0
0 + -12b = 10 + 29
-12b = 10 + 29

Combine like terms: 10 + 29 = 39
-12b = 39

Divide each side by '-12'.
b = -3.25

Simplifying
b = -3.25

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