X+7-3x=21

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Solution for X+7-3x=21 equation:


Simplifying
X + 7 + -3x = 21

Reorder the terms:
7 + X + -3x = 21

Solving
7 + X + -3x = 21

Solving for variable 'X'.

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

Add '-7' to each side of the equation.
7 + X + -7 + -3x = 21 + -7

Reorder the terms:
7 + -7 + X + -3x = 21 + -7

Combine like terms: 7 + -7 = 0
0 + X + -3x = 21 + -7
X + -3x = 21 + -7

Combine like terms: 21 + -7 = 14
X + -3x = 14

Add '3x' to each side of the equation.
X + -3x + 3x = 14 + 3x

Combine like terms: -3x + 3x = 0
X + 0 = 14 + 3x
X = 14 + 3x

Simplifying
X = 14 + 3x

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