100=4b+4(7-4b)

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Solution for 100=4b+4(7-4b) equation:


Simplifying
100 = 4b + 4(7 + -4b)
100 = 4b + (7 * 4 + -4b * 4)
100 = 4b + (28 + -16b)

Reorder the terms:
100 = 28 + 4b + -16b

Combine like terms: 4b + -16b = -12b
100 = 28 + -12b

Solving
100 = 28 + -12b

Solving for variable 'b'.

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

Add '12b' to each side of the equation.
100 + 12b = 28 + -12b + 12b

Combine like terms: -12b + 12b = 0
100 + 12b = 28 + 0
100 + 12b = 28

Add '-100' to each side of the equation.
100 + -100 + 12b = 28 + -100

Combine like terms: 100 + -100 = 0
0 + 12b = 28 + -100
12b = 28 + -100

Combine like terms: 28 + -100 = -72
12b = -72

Divide each side by '12'.
b = -6

Simplifying
b = -6

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