Question

medals an fan!!!!!!!!!!!!!!!!!!!!!!!!!Which number would you add to three and nine-tenths to give an approximate sum of 6?

two and one-third

three and two-elevenths

one and one-twelfth

two and seven-eighths

Answer 1

let x be that unknown number

Answer 2

ok

Answer 3

x + 3.9 = 6

to solve this for x, we subtract 3.9 from both sides

x + 3.9 - 3.9 = 6 - 3.9

x + 0 = 6 - 3.9

x + 0 = 2.1

x = 2.1

Answer 4

So that unknown number you add on is 2.1

Answer 5

huh @jim_thompson5910

Answer 6

where are you stuck?