9=3(10-b)

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Solution for 9=3(10-b) equation:


Simplifying
9 = 3(10 + -1b)
9 = (10 * 3 + -1b * 3)
9 = (30 + -3b)

Solving
9 = 30 + -3b

Solving for variable 'b'.

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

Add '3b' to each side of the equation.
9 + 3b = 30 + -3b + 3b

Combine like terms: -3b + 3b = 0
9 + 3b = 30 + 0
9 + 3b = 30

Add '-9' to each side of the equation.
9 + -9 + 3b = 30 + -9

Combine like terms: 9 + -9 = 0
0 + 3b = 30 + -9
3b = 30 + -9

Combine like terms: 30 + -9 = 21
3b = 21

Divide each side by '3'.
b = 7

Simplifying
b = 7

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