3x+x-2=-15

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Solution for 3x+x-2=-15 equation:


Simplifying
3x + x + -2 = -15

Reorder the terms:
-2 + 3x + x = -15

Combine like terms: 3x + x = 4x
-2 + 4x = -15

Solving
-2 + 4x = -15

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + 4x = -15 + 2

Combine like terms: -2 + 2 = 0
0 + 4x = -15 + 2
4x = -15 + 2

Combine like terms: -15 + 2 = -13
4x = -13

Divide each side by '4'.
x = -3.25

Simplifying
x = -3.25

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