x/x+3 and 4/5 are frations
2007-11-12 16:28:46 · 5 answers · asked by nikia watson 1 in Science & Mathematics ➔ Mathematics
Start by "cross multiplying" to get rid of the denominators. Multiply both sides by (x+3) and 5.
5x = 4(x+3)
Then distribute 4 through the parentheses:
5x = 4x + 12
Subtract 4x from both sides:
x = 12
2007-11-12 16:36:04 · answer #1 · answered by Puzzling 7 · 1⤊ 0⤋
What it's saying is that X over X = the same as 4\5 but plus 3
2007-11-12 16:36:08 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Ok: x/(x+3)=4/5
1) cross multiply:
5x=4(x+3)
2) distribute:
5x=4x+12
3) solve for x:
x=12.
the urge, i think, is to try to somehow factor x/(x+3); but you can't actually factor it in any way that will simplify the problem.
2007-11-12 16:41:11 · answer #3 · answered by thermodynaman2004 1 · 0⤊ 0⤋
To solve this first multiply both sides by x+3 to get:
x=4x/5+ 12/5
Then subtract both sides by 4x/5 to get:
x/5 = 12/5
Then Multiply both sides by 5 and get:
x= 12
2007-11-12 16:37:47 · answer #4 · answered by Anonymous · 0⤊ 0⤋
write it out and cross-multiply, making sure to multiply correctly. let me know your answer.
(I'm not going to give you the whole answer :P)
2007-11-12 16:39:07 · answer #5 · answered by Anonymous · 1⤊ 0⤋