-3(x-7)-(x+5)=7

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Solution for -3(x-7)-(x+5)=7 equation: 


Simplifying
-3(x + -7) + -1(x + 5) = 7

Reorder the terms:
-3(-7 + x) + -1(x + 5) = 7
(-7 * -3 + x * -3) + -1(x + 5) = 7
(21 + -3x) + -1(x + 5) = 7

Reorder the terms:
21 + -3x + -1(5 + x) = 7
21 + -3x + (5 * -1 + x * -1) = 7
21 + -3x + (-5 + -1x) = 7

Reorder the terms:
21 + -5 + -3x + -1x = 7

Combine like terms: 21 + -5 = 16
16 + -3x + -1x = 7

Combine like terms: -3x + -1x = -4x
16 + -4x = 7

Solving
16 + -4x = 7

Solving for variable 'x'.

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

Add '-16' to each side of the equation.
16 + -16 + -4x = 7 + -16

Combine like terms: 16 + -16 = 0
0 + -4x = 7 + -16
-4x = 7 + -16

Combine like terms: 7 + -16 = -9
-4x = -9

Divide each side by '-4'.
x = 2.25

Simplifying
x = 2.25

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