-7(9-3b)=30

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Solution for -7(9-3b)=30 equation: 


Simplifying
-7(9 + -3b) = 30
(9 * -7 + -3b * -7) = 30
(-63 + 21b) = 30

Solving
-63 + 21b = 30

Solving for variable 'b'.

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

Add '63' to each side of the equation.
-63 + 63 + 21b = 30 + 63

Combine like terms: -63 + 63 = 0
0 + 21b = 30 + 63
21b = 30 + 63

Combine like terms: 30 + 63 = 93
21b = 93

Divide each side by '21'.
b = 4.428571429

Simplifying
b = 4.428571429

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