4(5b+3)-7(4b+3)=4b+7

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Solution for 4(5b+3)-7(4b+3)=4b+7 equation:


Simplifying
4(5b + 3) + -7(4b + 3) = 4b + 7

Reorder the terms:
4(3 + 5b) + -7(4b + 3) = 4b + 7
(3 * 4 + 5b * 4) + -7(4b + 3) = 4b + 7
(12 + 20b) + -7(4b + 3) = 4b + 7

Reorder the terms:
12 + 20b + -7(3 + 4b) = 4b + 7
12 + 20b + (3 * -7 + 4b * -7) = 4b + 7
12 + 20b + (-21 + -28b) = 4b + 7

Reorder the terms:
12 + -21 + 20b + -28b = 4b + 7

Combine like terms: 12 + -21 = -9
-9 + 20b + -28b = 4b + 7

Combine like terms: 20b + -28b = -8b
-9 + -8b = 4b + 7

Reorder the terms:
-9 + -8b = 7 + 4b

Solving
-9 + -8b = 7 + 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.
-9 + -8b + -4b = 7 + 4b + -4b

Combine like terms: -8b + -4b = -12b
-9 + -12b = 7 + 4b + -4b

Combine like terms: 4b + -4b = 0
-9 + -12b = 7 + 0
-9 + -12b = 7

Add '9' to each side of the equation.
-9 + 9 + -12b = 7 + 9

Combine like terms: -9 + 9 = 0
0 + -12b = 7 + 9
-12b = 7 + 9

Combine like terms: 7 + 9 = 16
-12b = 16

Divide each side by '-12'.
b = -1.333333333

Simplifying
b = -1.333333333

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