7x-3=21-x+4

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


Simplifying
7x + -3 = 21 + -1x + 4

Reorder the terms:
-3 + 7x = 21 + -1x + 4

Reorder the terms:
-3 + 7x = 21 + 4 + -1x

Combine like terms: 21 + 4 = 25
-3 + 7x = 25 + -1x

Solving
-3 + 7x = 25 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
-3 + 7x + x = 25 + -1x + x

Combine like terms: 7x + x = 8x
-3 + 8x = 25 + -1x + x

Combine like terms: -1x + x = 0
-3 + 8x = 25 + 0
-3 + 8x = 25

Add '3' to each side of the equation.
-3 + 3 + 8x = 25 + 3

Combine like terms: -3 + 3 = 0
0 + 8x = 25 + 3
8x = 25 + 3

Combine like terms: 25 + 3 = 28
8x = 28

Divide each side by '8'.
x = 3.5

Simplifying
x = 3.5

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