How do you solve 3x + 16= x3x+16=x?

3 Answers
Apr 15, 2018

x=-8x=8

Explanation:

We can begin by subtracting 3x3x from both sides. Here, we want to get xx on one side, and it'll be easier to get it on the right hand side. We get:

16=-2x16=2x

We can divide both sides by -22 to get:

x=-8x=8

x=-8x=8

Explanation:

Okay, so what you do here is isolate the variable, xx. That would make the equation,

-2x=162x=16

Now, divide both sides by -22 and you'll get your answer.

x=-8x=8

Apr 15, 2018

x=-8x=8

Explanation:

"collect terms in x on the left side and numeric values"collect terms in x on the left side and numeric values
"on the right side of the equation"on the right side of the equation

"subtract x from both sides"subtract x from both sides

3x-x+16=cancel(x)cancel(-x)

rArr2x+16=0

"subtract 16 from both sides"

2xcancel(+16)cancel(-16)=0-16

rArr2x=-16

"divide both sides by 2"

(cancel(2) x)/cancel(2)=(-16)/2

rArrx=-8

color(blue)"As a check"

Substitute this value into the equation and if both sides are equal then it is the solution.

(3xx-8)+16=-24+16=-8=" right side"

rArrx=-8" is the solution"