7(b+3)=4b+15

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Solution for 7(b+3)=4b+15 equation:


Simplifying
7(b + 3) = 4b + 15

Reorder the terms:
7(3 + b) = 4b + 15
(3 * 7 + b * 7) = 4b + 15
(21 + 7b) = 4b + 15

Reorder the terms:
21 + 7b = 15 + 4b

Solving
21 + 7b = 15 + 4b

Solving for variable 'b'.

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

Add '-4b' to each side of the equation.
21 + 7b + -4b = 15 + 4b + -4b

Combine like terms: 7b + -4b = 3b
21 + 3b = 15 + 4b + -4b

Combine like terms: 4b + -4b = 0
21 + 3b = 15 + 0
21 + 3b = 15

Add '-21' to each side of the equation.
21 + -21 + 3b = 15 + -21

Combine like terms: 21 + -21 = 0
0 + 3b = 15 + -21
3b = 15 + -21

Combine like terms: 15 + -21 = -6
3b = -6

Divide each side by '3'.
b = -2

Simplifying
b = -2

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