-3x-(x+1)=7

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


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

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

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

Combine like terms: -3x + -1x = -4x
-1 + -4x = 7

Solving
-1 + -4x = 7

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + -4x = 7 + 1

Combine like terms: -1 + 1 = 0
0 + -4x = 7 + 1
-4x = 7 + 1

Combine like terms: 7 + 1 = 8
-4x = 8

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

Simplifying
x = -2

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