7(x+3)-x=4(x+1)+9

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Solution for 7(x+3)-x=4(x+1)+9 equation:


Simplifying
7(x + 3) + -1x = 4(x + 1) + 9

Reorder the terms:
7(3 + x) + -1x = 4(x + 1) + 9
(3 * 7 + x * 7) + -1x = 4(x + 1) + 9
(21 + 7x) + -1x = 4(x + 1) + 9

Combine like terms: 7x + -1x = 6x
21 + 6x = 4(x + 1) + 9

Reorder the terms:
21 + 6x = 4(1 + x) + 9
21 + 6x = (1 * 4 + x * 4) + 9
21 + 6x = (4 + 4x) + 9

Reorder the terms:
21 + 6x = 4 + 9 + 4x

Combine like terms: 4 + 9 = 13
21 + 6x = 13 + 4x

Solving
21 + 6x = 13 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
21 + 6x + -4x = 13 + 4x + -4x

Combine like terms: 6x + -4x = 2x
21 + 2x = 13 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 + 2x = 13 + 0
21 + 2x = 13

Add '-21' to each side of the equation.
21 + -21 + 2x = 13 + -21

Combine like terms: 21 + -21 = 0
0 + 2x = 13 + -21
2x = 13 + -21

Combine like terms: 13 + -21 = -8
2x = -8

Divide each side by '2'.
x = -4

Simplifying
x = -4

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