7x-3=21-9

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Solution for 7x-3=21-9 equation:


Simplifying
7x + -3 = 21 + -9

Reorder the terms:
-3 + 7x = 21 + -9

Combine like terms: 21 + -9 = 12
-3 + 7x = 12

Solving
-3 + 7x = 12

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 7x = 12 + 3

Combine like terms: -3 + 3 = 0
0 + 7x = 12 + 3
7x = 12 + 3

Combine like terms: 12 + 3 = 15
7x = 15

Divide each side by '7'.
x = 2.142857143

Simplifying
x = 2.142857143

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