Question

x+4/5x=180 plz show work

Answer 1

Answer:

The answer is 100.

Step-by-step explanation:

I started with solving 4 divided by 5. It was 0.8. I then started going thru 1 to 10 to 20 to 50 to 100. I was comparing big numbers. I then realized 100+0.8 times 100 = 180!

Answer 2

Answer: $x=100$

If the equation is $x+\frac45 x = 180$ we add on the LHS: $x(1+\frac45) = 180 \rightarrow x(\frac55+\frac45)= 180\\\frac95 x = 180$

At this point we divide both sides by 9 and multiply by 5:

$x=\frac 59 (180) = \frac59 (2\times 9 \times 10) = 100$