2006-11-22 10:02:33 · 14 answers · asked by MARIA G 1 in Science & Mathematics ➔ Mathematics
2x - 3 = 20/7
2x = 20/7 + 3 = 20/7 + 21/7 = 41/7
x = (41/7)/2 = 41/14.
2006-11-22 10:05:19 · answer #1 · answered by stephen m 4 · 0⤊ 0⤋
7(2x - 3) = 20
14x - 21 = 20
14x = 20 + 21
14x = 41
x = 41/14 = 2.9285714285714285714285714285714
2006-11-22 11:21:15 · answer #2 · answered by Anonymous · 0⤊ 0⤋
7(2x-3)=20
7(2x) - 7(3) = 20
14x-21=20
+21 +21
14x=41
14x/14 = 41/14
X= 2 13/14
2006-11-22 10:12:50 · answer #3 · answered by courtney 2 · 0⤊ 0⤋
Those others are wrong....
7(x-3) =20 multiply the 7 out to get....
7x -21 =20 then add 21 to both sides to get
7x = 41 then divide by 7 to get
x = 41/7 or 2.9285714....
X = 2.9285714
You then plug it in the formula to double check it.
2006-11-22 10:13:13 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Here's another way to do it:
7(2x-3)=20
14x-21=20
14x=41
x=41/14
2006-11-22 10:09:18 · answer #5 · answered by Rance D 5 · 0⤊ 0⤋
use the distrubutive property of multiplication:
7(2x-3)=20
7(2x)-7(3)=20
14x-21=20
14x-21+21=20+21
14x=41
x=41/14=a really long number
x=2.9285714285714285714285714285714285...........
or about 2.9286
2006-11-22 12:17:13 · answer #6 · answered by kwinnay 2 · 0⤊ 0⤋
7(2x - 3) = 20
14x - 21 = 20 (Add 21 to both sides)
14x = 41 (Divide both sides by 14)
x = 41/14
QED
2006-11-22 10:17:49 · answer #7 · answered by CSUFGrad2006 5 · 0⤊ 0⤋
7(2x-3)=20
14x-21=20
+21 +21
14x=41
/14 /14
x=2.928
2006-11-22 10:23:16 · answer #8 · answered by Heather 2 · 0⤊ 0⤋
7(2x-3)=20
14x-21=20
14x=20+21
14x=41
x=41/14
2006-11-22 14:01:37 · answer #9 · answered by sam 3 · 0⤊ 0⤋
distribute the 7: 14x -21=20
add 21 to both sides: 14x=41
divide by 21: x= 41/14
2006-11-22 10:12:19 · answer #10 · answered by kjwilson 1 · 0⤊ 0⤋