31.2=17.4+b

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Solution for 31.2=17.4+b equation: 


Simplifying
31.2 = 17.4 + b

Solving
31.2 = 17.4 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
31.2 + -1b = 17.4 + b + -1b

Combine like terms: b + -1b = 0
31.2 + -1b = 17.4 + 0
31.2 + -1b = 17.4

Add '-31.2' to each side of the equation.
31.2 + -31.2 + -1b = 17.4 + -31.2

Combine like terms: 31.2 + -31.2 = 0.0
0.0 + -1b = 17.4 + -31.2
-1b = 17.4 + -31.2

Combine like terms: 17.4 + -31.2 = -13.8
-1b = -13.8

Divide each side by '-1'.
b = 13.8

Simplifying
b = 13.8

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