Question

-50 = -5x - 3(5x + 15)

Answer 1

Answer:

x =1/4

Step-by-step explanation:

$-50 = -5x - 3(5x + 15)\\\\-5x-3\left(5x+15\right)=-50\\\\\mathrm{Expand}\:-3\left(5x+15\right):\quad -15x-45\\-5x-15x-45=-50\\\\\mathrm{Add\:similar\:elements:}\:-5x-15x=-20x\\-20x-45=-50\\\\\mathrm{Add\:}45\mathrm{\:to\:both\:sides}\\-20x-45+45=-50+45\\\\Simplify\\-20x=-5\\\\\mathrm{Divide\:both\:sides\:by\:}-20\\\frac{-20x}{-20}=\frac{-5}{-20}\\\\Simplify\\x=\frac{1}{4}$

Answer 2

Answer:

$x = \frac{1}{4}$

Step-by-step explanation:

$-50 = -5x - 3(5x + 15)$

Use -3 to open the bracket

$-3(5x +15)\\\\= -15x -45\\\\ -50 = -5x-15x -45$

Collect like terms

$-50 +45 =-5x -15x$

Simplify

$-5 = -20x$

Divide both sides of the equation by -20

$\frac{-5}{-20} = \frac{-20x}{-20} \\\\1/4 =x\\\\x = \frac{1}{4}$