13x-4.6x-3.9=8.7

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Solution for 13x-4.6x-3.9=8.7 equation:


Simplifying
13x + -4.6x + -3.9 = 8.7

Reorder the terms:
-3.9 + 13x + -4.6x = 8.7

Combine like terms: 13x + -4.6x = 8.4x
-3.9 + 8.4x = 8.7

Solving
-3.9 + 8.4x = 8.7

Solving for variable 'x'.

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

Add '3.9' to each side of the equation.
-3.9 + 3.9 + 8.4x = 8.7 + 3.9

Combine like terms: -3.9 + 3.9 = 0.0
0.0 + 8.4x = 8.7 + 3.9
8.4x = 8.7 + 3.9

Combine like terms: 8.7 + 3.9 = 12.6
8.4x = 12.6

Divide each side by '8.4'.
x = 1.5

Simplifying
x = 1.5

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