Question

4. The sum of two numbers is 90. They are in the ratio of 7:8. Find the numbers​

Answer 1

Answer:

LET THE TWO NOS BE 7X AND 8X

ATQ, 7X+8X=90

         15X=90

             X=6

7X=7*6=42

8X=8*6=48

NOS ARE 42,48

Step-by-step explanation:

Answer 2

Answer:

let the numbers are x and y

accordig to question ; x+y=90 (1)

and also x/y=7/8

8x=7y

8x-7y=0 (2)

multiply eq1  by 7 and then add both equation

we find that .. 15x=630

so x =42

by putting the value of x in eq 1   .. we get ; y=48

so the numbers are 42 and 48

Step-by-step explanation: