3(2.50+5.30x)=55.20

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Solution for 3(2.50+5.30x)=55.20 equation: 


Simplifying
3(2.50 + 5.30x) = 55.20
(2.50 * 3 + 5.30x * 3) = 55.20
(7.5 + 15.9x) = 55.20

Solving
7.5 + 15.9x = 55.20

Solving for variable 'x'.

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

Add '-7.5' to each side of the equation.
7.5 + -7.5 + 15.9x = 55.20 + -7.5

Combine like terms: 7.5 + -7.5 = 0.0
0.0 + 15.9x = 55.20 + -7.5
15.9x = 55.20 + -7.5

Combine like terms: 55.20 + -7.5 = 47.7
15.9x = 47.7

Divide each side by '15.9'.
x = 3

Simplifying
x = 3

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