7(3-b)=7b-(5b-3)

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Solution for 7(3-b)=7b-(5b-3) equation:


Simplifying
7(3 + -1b) = 7b + -1(5b + -3)
(3 * 7 + -1b * 7) = 7b + -1(5b + -3)
(21 + -7b) = 7b + -1(5b + -3)

Reorder the terms:
21 + -7b = 7b + -1(-3 + 5b)
21 + -7b = 7b + (-3 * -1 + 5b * -1)
21 + -7b = 7b + (3 + -5b)

Reorder the terms:
21 + -7b = 3 + 7b + -5b

Combine like terms: 7b + -5b = 2b
21 + -7b = 3 + 2b

Solving
21 + -7b = 3 + 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.
21 + -7b + -2b = 3 + 2b + -2b

Combine like terms: -7b + -2b = -9b
21 + -9b = 3 + 2b + -2b

Combine like terms: 2b + -2b = 0
21 + -9b = 3 + 0
21 + -9b = 3

Add '-21' to each side of the equation.
21 + -21 + -9b = 3 + -21

Combine like terms: 21 + -21 = 0
0 + -9b = 3 + -21
-9b = 3 + -21

Combine like terms: 3 + -21 = -18
-9b = -18

Divide each side by '-9'.
b = 2

Simplifying
b = 2

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