-2(3x+4)-(3+x)=10

Solution for -2(3x+4)-(3+x)=10 equation:

Simplifying
-2(3x + 4) + -1(3 + x) = 10

Reorder the terms:
-2(4 + 3x) + -1(3 + x) = 10
(4 * -2 + 3x * -2) + -1(3 + x) = 10
(-8 + -6x) + -1(3 + x) = 10
-8 + -6x + (3 * -1 + x * -1) = 10
-8 + -6x + (-3 + -1x) = 10

Reorder the terms:
-8 + -3 + -6x + -1x = 10

Combine like terms: -8 + -3 = -11
-11 + -6x + -1x = 10

Combine like terms: -6x + -1x = -7x
-11 + -7x = 10

Solving
-11 + -7x = 10

Solving for variable 'x'.

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

Add '11' to each side of the equation.
-11 + 11 + -7x = 10 + 11

Combine like terms: -11 + 11 = 0
0 + -7x = 10 + 11
-7x = 10 + 11

Combine like terms: 10 + 11 = 21
-7x = 21

Divide each side by '-7'.
x = -3

Simplifying
x = -3