3.1(b+3)=9.78-2b

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Solution for 3.1(b+3)=9.78-2b equation:


Simplifying
3.1(b + 3) = 9.78 + -2b

Reorder the terms:
3.1(3 + b) = 9.78 + -2b
(3 * 3.1 + b * 3.1) = 9.78 + -2b
(9.3 + 3.1b) = 9.78 + -2b

Solving
9.3 + 3.1b = 9.78 + -2b

Solving for variable 'b'.

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

Add '2b' to each side of the equation.
9.3 + 3.1b + 2b = 9.78 + -2b + 2b

Combine like terms: 3.1b + 2b = 5.1b
9.3 + 5.1b = 9.78 + -2b + 2b

Combine like terms: -2b + 2b = 0
9.3 + 5.1b = 9.78 + 0
9.3 + 5.1b = 9.78

Add '-9.3' to each side of the equation.
9.3 + -9.3 + 5.1b = 9.78 + -9.3

Combine like terms: 9.3 + -9.3 = 0.0
0.0 + 5.1b = 9.78 + -9.3
5.1b = 9.78 + -9.3

Combine like terms: 9.78 + -9.3 = 0.48
5.1b = 0.48

Divide each side by '5.1'.
b = 0.09411764706

Simplifying
b = 0.09411764706

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