Question

Solve 5(2x + 4) = 15. Round to the nearest thousandth.

Answer 1

`\huge\boxed{x=-0.5}`

Explanation:

`5(2x+4)=15\qquad\text{divide both sides by 5}\\\\(5\!\!\!\!\diagup(2x+4))/(5\!\!\!\!\diagup)=(15\!\!\!\!\!\diagup)/(5\!\!\!\!\diagup)\\\\2x+4=3\qquad\text{subtract 4 from both sides}\\\\2x+4-4=3-4\\\\2x=-1\qquad\text{divide both sides by 2}\\\\(2x)/(2)=(-1)/(2)\\\\\boxed{x=-0.5}`

Answer 2

`5(2x + 4) = 15\\10x+20=15\\10x=-5\\x=-(5)/(10)=-0,5`