-3=7(x+3)+x

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


Simplifying
-3 = 7(x + 3) + x

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

Combine like terms: 7x + x = 8x
-3 = 21 + 8x

Solving
-3 = 21 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
-3 + -8x = 21 + 8x + -8x

Combine like terms: 8x + -8x = 0
-3 + -8x = 21 + 0
-3 + -8x = 21

Add '3' to each side of the equation.
-3 + 3 + -8x = 21 + 3

Combine like terms: -3 + 3 = 0
0 + -8x = 21 + 3
-8x = 21 + 3

Combine like terms: 21 + 3 = 24
-8x = 24

Divide each side by '-8'.
x = -3

Simplifying
x = -3

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