8(9.90)+12(5.30)=20x

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Solution for 8(9.90)+12(5.30)=20x equation: 


Simplifying
8(9.90) + 12(5.30) = 20x

Multiply 8 * 9.90
79.2 + 12(5.30) = 20x

Multiply 12 * 5.30
79.2 + 63.6 = 20x

Combine like terms: 79.2 + 63.6 = 142.8
142.8 = 20x

Solving
142.8 = 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
142.8 + -20x = 20x + -20x

Combine like terms: 20x + -20x = 0
142.8 + -20x = 0

Add '-142.8' to each side of the equation.
142.8 + -142.8 + -20x = 0 + -142.8

Combine like terms: 142.8 + -142.8 = 0.0
0.0 + -20x = 0 + -142.8
-20x = 0 + -142.8

Combine like terms: 0 + -142.8 = -142.8
-20x = -142.8

Divide each side by '-20'.
x = 7.14

Simplifying
x = 7.14

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