4(3-b)=5(4-b)

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Solution for 4(3-b)=5(4-b) equation:


Simplifying
4(3 + -1b) = 5(4 + -1b)
(3 * 4 + -1b * 4) = 5(4 + -1b)
(12 + -4b) = 5(4 + -1b)
12 + -4b = (4 * 5 + -1b * 5)
12 + -4b = (20 + -5b)

Solving
12 + -4b = 20 + -5b

Solving for variable 'b'.

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

Add '5b' to each side of the equation.
12 + -4b + 5b = 20 + -5b + 5b

Combine like terms: -4b + 5b = 1b
12 + 1b = 20 + -5b + 5b

Combine like terms: -5b + 5b = 0
12 + 1b = 20 + 0
12 + 1b = 20

Add '-12' to each side of the equation.
12 + -12 + 1b = 20 + -12

Combine like terms: 12 + -12 = 0
0 + 1b = 20 + -12
1b = 20 + -12

Combine like terms: 20 + -12 = 8
1b = 8

Divide each side by '1'.
b = 8

Simplifying
b = 8

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