13.5=X-(-0.8)

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Solution for 13.5=X-(-0.8) equation: 


Simplifying
13.5 = X + -1(-0.8)

Multiply -1 * -0.8
13.5 = X + 0.8

Reorder the terms:
13.5 = 0.8 + X

Solving
13.5 = 0.8 + X

Solving for variable 'X'.

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

Add '-1X' to each side of the equation.
13.5 + -1X = 0.8 + X + -1X

Combine like terms: X + -1X = 0
13.5 + -1X = 0.8 + 0
13.5 + -1X = 0.8

Add '-13.5' to each side of the equation.
13.5 + -13.5 + -1X = 0.8 + -13.5

Combine like terms: 13.5 + -13.5 = 0.0
0.0 + -1X = 0.8 + -13.5
-1X = 0.8 + -13.5

Combine like terms: 0.8 + -13.5 = -12.7
-1X = -12.7

Divide each side by '-1'.
X = 12.7

Simplifying
X = 12.7

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