Question

please tell question 1 to 7​

Answer 1

Answer:

Step-by-step explanation:

Question 1:

Answer=number =4

explanation:

let a number be x

thus if we subtract 5/2 from the number equation becomes (x-5/2)

next,the result is multiply by 8 that is above equation multiply by 8

therefore equation 2 becomes (x-5/2)*8

next, question said result equation is 3 times of number

that is

(x-5/2)*8=3*x

multiply 8 by opening bracket thus

(X*8)-(5/2*8)=3*x

8x-5*4=3x

write x at LHS and 20 on RHS

8x-3x=20

5x=20

x=20/5

x=4

Question 2:

answer=one number =7 and second number =35

Explanation

let a number be x

and another Number be y

thus

From first statement x=5y [as one number is 5 times of second number]

from next statement

(x+21)=2(y+21)

x+21=2y+42   from first equation put x=5y

5y+21=2y+42

Put Y on one side and whole number on another

5y-2y=42-21

3y=21

y=21/3

y=7

x=5y=5*7

X=35