3(x+4)-5(2x+8)=9x-42

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Solution for 3(x+4)-5(2x+8)=9x-42 equation:


Simplifying
3(x + 4) + -5(2x + 8) = 9x + -42

Reorder the terms:
3(4 + x) + -5(2x + 8) = 9x + -42
(4 * 3 + x * 3) + -5(2x + 8) = 9x + -42
(12 + 3x) + -5(2x + 8) = 9x + -42

Reorder the terms:
12 + 3x + -5(8 + 2x) = 9x + -42
12 + 3x + (8 * -5 + 2x * -5) = 9x + -42
12 + 3x + (-40 + -10x) = 9x + -42

Reorder the terms:
12 + -40 + 3x + -10x = 9x + -42

Combine like terms: 12 + -40 = -28
-28 + 3x + -10x = 9x + -42

Combine like terms: 3x + -10x = -7x
-28 + -7x = 9x + -42

Reorder the terms:
-28 + -7x = -42 + 9x

Solving
-28 + -7x = -42 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
-28 + -7x + -9x = -42 + 9x + -9x

Combine like terms: -7x + -9x = -16x
-28 + -16x = -42 + 9x + -9x

Combine like terms: 9x + -9x = 0
-28 + -16x = -42 + 0
-28 + -16x = -42

Add '28' to each side of the equation.
-28 + 28 + -16x = -42 + 28

Combine like terms: -28 + 28 = 0
0 + -16x = -42 + 28
-16x = -42 + 28

Combine like terms: -42 + 28 = -14
-16x = -14

Divide each side by '-16'.
x = 0.875

Simplifying
x = 0.875

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