4(7-3b)=100

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Solution for 4(7-3b)=100 equation: 


Simplifying
4(7 + -3b) = 100
(7 * 4 + -3b * 4) = 100
(28 + -12b) = 100

Solving
28 + -12b = 100

Solving for variable 'b'.

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

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

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

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

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

Simplifying
b = -6

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