-3X+15+X+13=-X+20

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Solution for -3X+15+X+13=-X+20 equation: 


Simplifying
-3X + 15 + X + 13 = -1X + 20

Reorder the terms:
15 + 13 + -3X + X = -1X + 20

Combine like terms: 15 + 13 = 28
28 + -3X + X = -1X + 20

Combine like terms: -3X + X = -2X
28 + -2X = -1X + 20

Reorder the terms:
28 + -2X = 20 + -1X

Solving
28 + -2X = 20 + -1X

Solving for variable 'X'.

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

Add 'X' to each side of the equation.
28 + -2X + X = 20 + -1X + X

Combine like terms: -2X + X = -1X
28 + -1X = 20 + -1X + X

Combine like terms: -1X + X = 0
28 + -1X = 20 + 0
28 + -1X = 20

Add '-28' to each side of the equation.
28 + -28 + -1X = 20 + -28

Combine like terms: 28 + -28 = 0
0 + -1X = 20 + -28
-1X = 20 + -28

Combine like terms: 20 + -28 = -8
-1X = -8

Divide each side by '-1'.
X = 8

Simplifying
X = 8

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