-7(-3+b)=-42

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Solution for -7(-3+b)=-42 equation: 


Simplifying
-7(-3 + b) = -42
(-3 * -7 + b * -7) = -42
(21 + -7b) = -42

Solving
21 + -7b = -42

Solving for variable 'b'.

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

Add '-21' to each side of the equation.
21 + -21 + -7b = -42 + -21

Combine like terms: 21 + -21 = 0
0 + -7b = -42 + -21
-7b = -42 + -21

Combine like terms: -42 + -21 = -63
-7b = -63

Divide each side by '-7'.
b = 9

Simplifying
b = 9

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