-4+2[-7-9b]=-72

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Solution for -4+2[-7-9b]=-72 equation:


Simplifying
-4 + 2[-7 + -9b] = -72
-4 + [-7 * 2 + -9b * 2] = -72
-4 + [-14 + -18b] = -72

Combine like terms: -4 + -14 = -18
-18 + -18b = -72

Solving
-18 + -18b = -72

Solving for variable 'b'.

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

Add '18' to each side of the equation.
-18 + 18 + -18b = -72 + 18

Combine like terms: -18 + 18 = 0
0 + -18b = -72 + 18
-18b = -72 + 18

Combine like terms: -72 + 18 = -54
-18b = -54

Divide each side by '-18'.
b = 3

Simplifying
b = 3

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