Question

Please help me on this question

Answer 1

ak - kr k(a - r)

x = -------------- or x = ------------

7 7

Explanation:

1. Multiply all three terms by k to eliminate the fraction:

ak = 7x - kr

2. Subtract kr from both sides:

7x = ak - kr

3. Divide both sides by 7:

ak - kr k(a - r)

x = -------------- or x = ------------

7 7

Answer 2

x =
`(k(a+r))/(7)`

Explanation:

Given

a =
`(7x)/(k)` - r ( add r to both sides )

a + r =
`(7x)/(k)` ( multiply both sides by k to clear the fraction )

k(a + r) = 7x ( divide both sides by 7 )

`(k(a+r))/(7)` = x