7x+5-2x-2=21

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Solution for 7x+5-2x-2=21 equation:


Simplifying
7x + 5 + -2x + -2 = 21

Reorder the terms:
5 + -2 + 7x + -2x = 21

Combine like terms: 5 + -2 = 3
3 + 7x + -2x = 21

Combine like terms: 7x + -2x = 5x
3 + 5x = 21

Solving
3 + 5x = 21

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 + 5x = 21 + -3

Combine like terms: 3 + -3 = 0
0 + 5x = 21 + -3
5x = 21 + -3

Combine like terms: 21 + -3 = 18
5x = 18

Divide each side by '5'.
x = 3.6

Simplifying
x = 3.6

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