10(1+3b)=-21

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Solution for 10(1+3b)=-21 equation: 


Simplifying
10(1 + 3b) = -21
(1 * 10 + 3b * 10) = -21
(10 + 30b) = -21

Solving
10 + 30b = -21

Solving for variable 'b'.

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

Add '-10' to each side of the equation.
10 + -10 + 30b = -21 + -10

Combine like terms: 10 + -10 = 0
0 + 30b = -21 + -10
30b = -21 + -10

Combine like terms: -21 + -10 = -31
30b = -31

Divide each side by '30'.
b = -1.033333333

Simplifying
b = -1.033333333

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