0.1(7+X)+0.4X=8.70

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Solution for 0.1(7+X)+0.4X=8.70 equation: 


Simplifying
0.1(7 + X) + 0.4X = 8.70
(7 * 0.1 + X * 0.1) + 0.4X = 8.70
(0.7 + 0.1X) + 0.4X = 8.70

Combine like terms: 0.1X + 0.4X = 0.5X
0.7 + 0.5X = 8.70

Solving
0.7 + 0.5X = 8.70

Solving for variable 'X'.

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

Add '-0.7' to each side of the equation.
0.7 + -0.7 + 0.5X = 8.70 + -0.7

Combine like terms: 0.7 + -0.7 = 0.0
0.0 + 0.5X = 8.70 + -0.7
0.5X = 8.70 + -0.7

Combine like terms: 8.70 + -0.7 = 8
0.5X = 8

Divide each side by '0.5'.
X = 16

Simplifying
X = 16

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