Question

A can do a piece of work in x day and B cando the same work in x+6 days.If both working together can do it in 15 days;calculate x
@sepeario

Answer 1

@Sepeario

Answer 2

Sorry I stuffed up. \[\frac{ A }{ x }+\frac{ B }{ x+6 }=15\]

Answer 3

Can you further expand/evaluate that?

Answer 4

a=x
b=x+6
a+b=16
sub
a and b into a+b=16
x+x+6=16
2x=10
x=5

Answer 5

I'm confused

Answer 6

understand now?

Answer 7

It's 15 days not 16 :S

Answer 8

oh whoops

Answer 9

a=x
b=x+6
a+b=15
sub
a and b into a+b=15
x+x+6=15
2x=9
x=9/2 or 4.5

Answer 10

now you get it :)

Answer 11

so A can do a piece of work in 4.5 days
B can do a piece of work in 10.5 days
and together they can do a piece of work in 4.5days

Answer 12

Very well explained :)

Answer 13

thanks @Sepeario

Answer 14

This method is simple but the ans is 24 :/

Answer 15

thats weird?

Answer 16

can you check if your question you posted was right

Answer 17

I have posted the question word for word .

Answer 18

@Sepeario

Answer 19

Nevertheless ,I'll ask my teacher xD Can u help me with 3 more question?

Answer 20

okay