7x-4=3x-21

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


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

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

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

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

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

Combine like terms: 3x + -3x = 0
-4 + 4x = -21 + 0
-4 + 4x = -21

Add '4' to each side of the equation.
-4 + 4 + 4x = -21 + 4

Combine like terms: -4 + 4 = 0
0 + 4x = -21 + 4
4x = -21 + 4

Combine like terms: -21 + 4 = -17
4x = -17

Divide each side by '4'.
x = -4.25

Simplifying
x = -4.25

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