solve the equation
2006-11-06 08:44:55 · 7 answers · asked by michaelaabbs 2 in Science & Mathematics ➔ Mathematics
4/x=(8)/x+4
so,4(x+4)=8x (cross multiplying yields)
so,4x+16=8x (subtracting 4x from both sides yields)
so,16=4x (dividing both sides by 4 yields)
so,x=4
2006-11-06 08:51:28 · answer #1 · answered by Anonymous · 0⤊ 0⤋
4/x = 8/x+4 (this is a ratio, so cross multiply to solve)
4x+16 = 8x
divide both side by 4 to get:
x + 4 = 2x
subract x for both sides to get:
4 = x
2006-11-06 16:52:24 · answer #2 · answered by Valarie7979 2 · 0⤊ 0⤋
4/x = 8/(x + 4)
Clear the fractions by multiplying both sides by
x(x + 4)
4(x + 4) = 8x
4x + 16 = 8x
-4x = -16
x = 4
2006-11-06 16:50:27 · answer #3 · answered by kindricko 7 · 0⤊ 0⤋
x(x + 4)
4(x + 4) = 8x
4x + 16 = 8x
-4x = -16
x = 4
2006-11-06 16:55:36 · answer #4 · answered by J 6 · 0⤊ 0⤋
4/x=8/(x+4) multiply by x(x+4)
4(X+4)=8X
4X+16=8X
4X=16
X=4
2006-11-06 17:01:19 · answer #5 · answered by yupchagee 7 · 0⤊ 0⤋
4(x+4)=8x
4x+4(8)=8x
4x+32=8x
32=4x
8=x
I'm sure i'm right cause i just took a test on this today i passed of course
2006-11-06 17:02:52 · answer #6 · answered by S]-[0RTII 1 · 0⤊ 0⤋
you cross multiply.
8x=4x+16
4x=16
x=4
2006-11-06 16:51:38 · answer #7 · answered by moonfreak♦ 5 · 0⤊ 0⤋