x+7=3x+9

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Solution for x+7=3x+9 equation:


Simplifying
x + 7 = 3x + 9

Reorder the terms:
7 + x = 3x + 9

Reorder the terms:
7 + x = 9 + 3x

Solving
7 + x = 9 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
7 + x + -3x = 9 + 3x + -3x

Combine like terms: x + -3x = -2x
7 + -2x = 9 + 3x + -3x

Combine like terms: 3x + -3x = 0
7 + -2x = 9 + 0
7 + -2x = 9

Add '-7' to each side of the equation.
7 + -7 + -2x = 9 + -7

Combine like terms: 7 + -7 = 0
0 + -2x = 9 + -7
-2x = 9 + -7

Combine like terms: 9 + -7 = 2
-2x = 2

Divide each side by '-2'.
x = -1

Simplifying
x = -1

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