21x-3-5=7

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Solution for 21x-3-5=7 equation:


Simplifying
21x + -3 + -5 = 7

Reorder the terms:
-3 + -5 + 21x = 7

Combine like terms: -3 + -5 = -8
-8 + 21x = 7

Solving
-8 + 21x = 7

Solving for variable 'x'.

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

Add '8' to each side of the equation.
-8 + 8 + 21x = 7 + 8

Combine like terms: -8 + 8 = 0
0 + 21x = 7 + 8
21x = 7 + 8

Combine like terms: 7 + 8 = 15
21x = 15

Divide each side by '21'.
x = 0.7142857143

Simplifying
x = 0.7142857143

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