3(7-2x)+7x=20

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Solution for 3(7-2x)+7x=20 equation:


Simplifying
3(7 + -2x) + 7x = 20
(7 * 3 + -2x * 3) + 7x = 20
(21 + -6x) + 7x = 20

Combine like terms: -6x + 7x = 1x
21 + 1x = 20

Solving
21 + 1x = 20

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 1x = 20 + -21

Combine like terms: 21 + -21 = 0
0 + 1x = 20 + -21
1x = 20 + -21

Combine like terms: 20 + -21 = -1
1x = -1

Divide each side by '1'.
x = -1

Simplifying
x = -1

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