-84=7-7(8-3b)

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Solution for -84=7-7(8-3b) equation:


Simplifying
-84 = 7 + -7(8 + -3b)
-84 = 7 + (8 * -7 + -3b * -7)
-84 = 7 + (-56 + 21b)

Combine like terms: 7 + -56 = -49
-84 = -49 + 21b

Solving
-84 = -49 + 21b

Solving for variable 'b'.

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

Add '-21b' to each side of the equation.
-84 + -21b = -49 + 21b + -21b

Combine like terms: 21b + -21b = 0
-84 + -21b = -49 + 0
-84 + -21b = -49

Add '84' to each side of the equation.
-84 + 84 + -21b = -49 + 84

Combine like terms: -84 + 84 = 0
0 + -21b = -49 + 84
-21b = -49 + 84

Combine like terms: -49 + 84 = 35
-21b = 35

Divide each side by '-21'.
b = -1.666666667

Simplifying
b = -1.666666667

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