I don't know how to get X

x=10

Step-by-step explanation:

P+S=140

(5x+30)+80=140

5x+30=80

5x=50

x=10

6

Step-by-step explanation:

Sun of P and S = 140

Measure of S = 80

Measure of P = 5x + 30

5x + 30 + 80 = 140

5x + 110 = 140

5x = 140 - 110

5x = 30

x = 30 ÷ 5

x = 6

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

the correct answer is d

hope this