x+3x-1=2x+7

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Solution for x+3x-1=2x+7 equation:


Simplifying
x + 3x + -1 = 2x + 7

Reorder the terms:
-1 + x + 3x = 2x + 7

Combine like terms: x + 3x = 4x
-1 + 4x = 2x + 7

Reorder the terms:
-1 + 4x = 7 + 2x

Solving
-1 + 4x = 7 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
-1 + 4x + -2x = 7 + 2x + -2x

Combine like terms: 4x + -2x = 2x
-1 + 2x = 7 + 2x + -2x

Combine like terms: 2x + -2x = 0
-1 + 2x = 7 + 0
-1 + 2x = 7

Add '1' to each side of the equation.
-1 + 1 + 2x = 7 + 1

Combine like terms: -1 + 1 = 0
0 + 2x = 7 + 1
2x = 7 + 1

Combine like terms: 7 + 1 = 8
2x = 8

Divide each side by '2'.
x = 4

Simplifying
x = 4

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