-(3+b)=7

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


Simplifying
-1(3 + b) = 7
(3 * -1 + b * -1) = 7
(-3 + -1b) = 7

Solving
-3 + -1b = 7

Solving for variable 'b'.

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

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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