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

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


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

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

Reorder the terms:
-1 + 3x + -1x = 3x + -7

Combine like terms: 3x + -1x = 2x
-1 + 2x = 3x + -7

Reorder the terms:
-1 + 2x = -7 + 3x

Solving
-1 + 2x = -7 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-1 + 2x + -3x = -7 + 3x + -3x

Combine like terms: 2x + -3x = -1x
-1 + -1x = -7 + 3x + -3x

Combine like terms: 3x + -3x = 0
-1 + -1x = -7 + 0
-1 + -1x = -7

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

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

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

Divide each side by '-1'.
x = 6

Simplifying
x = 6

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