3*(2x+7)=105-x

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Solution for 3*(2x+7)=105-x equation:


Simplifying
3(2x + 7) = 105 + -1x

Reorder the terms:
3(7 + 2x) = 105 + -1x
(7 * 3 + 2x * 3) = 105 + -1x
(21 + 6x) = 105 + -1x

Solving
21 + 6x = 105 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
21 + 6x + x = 105 + -1x + x

Combine like terms: 6x + x = 7x
21 + 7x = 105 + -1x + x

Combine like terms: -1x + x = 0
21 + 7x = 105 + 0
21 + 7x = 105

Add '-21' to each side of the equation.
21 + -21 + 7x = 105 + -21

Combine like terms: 21 + -21 = 0
0 + 7x = 105 + -21
7x = 105 + -21

Combine like terms: 105 + -21 = 84
7x = 84

Divide each side by '7'.
x = 12

Simplifying
x = 12

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