0.7(X+20)+0.9x=78

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Solution for 0.7(X+20)+0.9x=78 equation: 


Simplifying
0.7(X + 20) + 0.9x = 78

Reorder the terms:
0.7(20 + X) + 0.9x = 78
(20 * 0.7 + X * 0.7) + 0.9x = 78
(14 + 0.7X) + 0.9x = 78

Solving
14 + 0.7X + 0.9x = 78

Solving for variable 'X'.

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

Add '-14' to each side of the equation.
14 + 0.7X + -14 + 0.9x = 78 + -14

Reorder the terms:
14 + -14 + 0.7X + 0.9x = 78 + -14

Combine like terms: 14 + -14 = 0
0 + 0.7X + 0.9x = 78 + -14
0.7X + 0.9x = 78 + -14

Combine like terms: 78 + -14 = 64
0.7X + 0.9x = 64

Add '-0.9x' to each side of the equation.
0.7X + 0.9x + -0.9x = 64 + -0.9x

Combine like terms: 0.9x + -0.9x = 0.0
0.7X + 0.0 = 64 + -0.9x
0.7X = 64 + -0.9x

Divide each side by '0.7'.
X = 91.42857143 + -1.285714286x

Simplifying
X = 91.42857143 + -1.285714286x

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