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

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Solution for 3(7+2x)=7(x-1) equation:


Simplifying
3(7 + 2x) = 7(x + -1)
(7 * 3 + 2x * 3) = 7(x + -1)
(21 + 6x) = 7(x + -1)

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

Solving
21 + 6x = -7 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
21 + 6x + -7x = -7 + 7x + -7x

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

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

Add '-21' to each side of the equation.
21 + -21 + -1x = -7 + -21

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

Combine like terms: -7 + -21 = -28
-1x = -28

Divide each side by '-1'.
x = 28

Simplifying
x = 28

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