7x+3-21=0

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Solution for 7x+3-21=0 equation:


Simplifying
7x + 3 + -21 = 0

Reorder the terms:
3 + -21 + 7x = 0

Combine like terms: 3 + -21 = -18
-18 + 7x = 0

Solving
-18 + 7x = 0

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + 7x = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 7x = 0 + 18
7x = 0 + 18

Combine like terms: 0 + 18 = 18
7x = 18

Divide each side by '7'.
x = 2.571428571

Simplifying
x = 2.571428571

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