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

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


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

Remove parenthesis around (1 + -1x)
1 + -1x + -1(3 + x) = 7
1 + -1x + (3 * -1 + x * -1) = 7
1 + -1x + (-3 + -1x) = 7

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

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

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

Solving
-2 + -2x = 7

Solving for variable 'x'.

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

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

Combine like terms: -2 + 2 = 0
0 + -2x = 7 + 2
-2x = 7 + 2

Combine like terms: 7 + 2 = 9
-2x = 9

Divide each side by '-2'.
x = -4.5

Simplifying
x = -4.5

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