Question

need help step by step help needed

1/r-5=7/2r

Answer 1

does your question look like this?

Answer 2

yes @Vocaloid

Answer 3

start by cross multiplying

Answer 4

Use cross multiplication.
1*2r = 7(r-5)

Answer 5

^ know where to go from there?

Answer 6

no @Vocaloid

Answer 7

distribute the 7.

7(r-5) = ?

Answer 8

so 7r+2

Answer 9

@Vocaloid

Answer 10

no multiplie 7 by -5 too

Answer 11

not quite

Answer 12

how distribution works:

A(B-C) = A*B - A*C

so, following that same pattern, what is

7(r-5) = ?

Answer 13

7r-35

Answer 14

yes

Answer 15

good!

now we have

2r = 7r - 35

subtract 2r from each side. what do you get?

Answer 16

so 5r-35

Answer 17

almost, don't forget the 0 on the left side

0 = 5r - 35

now add 35 to both sides

Answer 18

r=7

Answer 19

35=5r

Answer 20

good, now divide both sides by 5

Answer 21

you have to solve the rational equation by combining expressions and isolating the varible r

Answer 22

ok so 35/5 = 7

Answer 23

so r=7

Answer 24

@Vocaloid

Answer 25

good

Answer 26

yes