7=100-3b

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Solution for 7=100-3b equation:


Simplifying
7 = 100 + -3b

Solving
7 = 100 + -3b

Solving for variable 'b'.

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

Add '3b' to each side of the equation.
7 + 3b = 100 + -3b + 3b

Combine like terms: -3b + 3b = 0
7 + 3b = 100 + 0
7 + 3b = 100

Add '-7' to each side of the equation.
7 + -7 + 3b = 100 + -7

Combine like terms: 7 + -7 = 0
0 + 3b = 100 + -7
3b = 100 + -7

Combine like terms: 100 + -7 = 93
3b = 93

Divide each side by '3'.
b = 31

Simplifying
b = 31

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