4x-21=3x-7

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Solution for 4x-21=3x-7 equation:


Simplifying
4x + -21 = 3x + -7

Reorder the terms:
-21 + 4x = 3x + -7

Reorder the terms:
-21 + 4x = -7 + 3x

Solving
-21 + 4x = -7 + 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.
-21 + 4x + -3x = -7 + 3x + -3x

Combine like terms: 4x + -3x = 1x
-21 + 1x = -7 + 3x + -3x

Combine like terms: 3x + -3x = 0
-21 + 1x = -7 + 0
-21 + 1x = -7

Add '21' to each side of the equation.
-21 + 21 + 1x = -7 + 21

Combine like terms: -21 + 21 = 0
0 + 1x = -7 + 21
1x = -7 + 21

Combine like terms: -7 + 21 = 14
1x = 14

Divide each side by '1'.
x = 14

Simplifying
x = 14

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