1. checking for correct steps

It takes jack 5 hours to finish a yard and shelly 3 hours to finish the same yard, how much time would it take them together.

jack = 1 and shelly is 1
5 3

15(x/5 +x/3)= 1(15)

3x + 5x = 15

8x = 15
x= 1(9/8)

have I done this correctly?

2. Originally Posted by Brama Bull
It takes jack 5 hours to finish a yard and shelly 3 hours to finish the same yard, how much time would it take them together.

jack = 1 and shelly is 1
5 3

15(x/5 +x/3)= 1(15)

3x + 5x = 15

8x = 15
x= 1(9/8)

have I done this correctly?
Hi Brama Bull,

Almost.

$8x=15$

$x=\frac{15}{8}$

$x=1 \frac{7}{8}$ hours together