3x+x-5=15

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Solution for 3x+x-5=15 equation: 


Simplifying
3x + x + -5 = 15

Reorder the terms:
-5 + 3x + x = 15

Combine like terms: 3x + x = 4x
-5 + 4x = 15

Solving
-5 + 4x = 15

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 4x = 15 + 5

Combine like terms: -5 + 5 = 0
0 + 4x = 15 + 5
4x = 15 + 5

Combine like terms: 15 + 5 = 20
4x = 20

Divide each side by '4'.
x = 5

Simplifying
x = 5

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