3x+x-15=5

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


Simplifying
3x + x + -15 = 5

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

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

Solving
-15 + 4x = 5

Solving for variable 'x'.

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

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

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

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

Divide each side by '4'.
x = 5

Simplifying
x = 5

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