x-8.7=4.2

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Solution for x-8.7=4.2 equation: 


Simplifying
x + -8.7 = 4.2

Reorder the terms:
-8.7 + x = 4.2

Solving
-8.7 + x = 4.2

Solving for variable 'x'.

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

Add '8.7' to each side of the equation.
-8.7 + 8.7 + x = 4.2 + 8.7

Combine like terms: -8.7 + 8.7 = 0.0
0.0 + x = 4.2 + 8.7
x = 4.2 + 8.7

Combine like terms: 4.2 + 8.7 = 12.9
x = 12.9

Simplifying
x = 12.9

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