2006-10-10 08:24:35 · 22 answers · asked by sammy 1 in Science & Mathematics ➔ Mathematics
write an equation~
3/4 * x = 21
x = 21* 4/3
x = 7 * 4 = 28
tada!
2006-10-10 08:26:51 · answer #1 · answered by sasmallworld 6 · 1⤊ 0⤋
21 x 4 / 3 = 28
2006-10-10 08:28:15 · answer #2 · answered by zdfun 2 · 0⤊ 0⤋
What Is Three Quarters Of 28
2017-01-12 18:38:37 · answer #3 · answered by hummons 4 · 0⤊ 0⤋
"three quarters of a number is 21."
we can sucessively replace pieces of the word problem with mathematical notation to get:
three quarters * a number is 21 // * == of
three quarters * a number = 21 // is == =
three quarters * x = 21 // x == a number
(3/4) * x = 21 // three quarters == 3/4
now do the same to both sides in this case multiply by 4
3 * x = 84
now divide both sides by 3
x = 84/3 = 28
put this back into theoriginal "
"three quarters of 28 is 21."
2006-10-10 08:43:28 · answer #4 · answered by Anonymous · 0⤊ 0⤋
28
2006-10-10 08:39:20 · answer #5 · answered by Eric O 2 · 0⤊ 0⤋
28
2006-10-10 08:31:33 · answer #6 · answered by Calirican 1 · 0⤊ 0⤋
28
2006-10-10 08:27:13 · answer #7 · answered by Apschminkey 3 · 0⤊ 0⤋
21(4/3) = 28
2006-10-10 08:27:13 · answer #8 · answered by Melody 3 · 0⤊ 0⤋
28 because 21=3/4 so you divide by three to get the root and it is 7 and you multiply it by the 4 to get 28
2006-10-10 09:02:16 · answer #9 · answered by Anonymous · 0⤊ 0⤋
x * 3/4 = 21
x = 21 * 4 / 3 = 28
2006-10-10 09:03:09 · answer #10 · answered by Dr. J. 6 · 0⤊ 0⤋