Question

please tell me the acid and show the solution also of all the question please help me I am just like your sister.​

Answer 1

Answer:

For problem 1)

Take a number =x

Twice it = 2x

And subtract it from 10 gives 2

10-2x=2

-2x=2-10

-2x=-8

2x= 8

x=8/2=4 is the required number

For problem 2)

Take a number = x

Take One-eighth of that number = 1/8 x

According to question

1/8 x+ 6= 8

1/8 x = 8-6

1/8c =2

x= 2*8

x=16

For problem 3

Take a number = x

Take twice of it = 2x

According to question

2x/5=6

2x=5*6

2x=30

x= 30/2=15

For problem 4

The sum of two consecutive number is 21

Let's a take a number = x

The next number will be = x+1

According to question

x+(x+1)= 21

x+x+1=21

2x=21-1

2x=20

x=20/2=10

So

x= 10

x+1= 11

The two numbers are 10,11

For Q3 i

x-4=1

x=4+1=5. Chek it put x=5 5-4=1. 1=1

(ii) x+5= 3

x=3-5= - 2 check it

(iii) 2x+18=40

2x=40-18

2x=22

x= 22/2=11

Q2 (i)

x+ 8= 10

Put x= 1

1+ 8= 10

9=10

It is not true

Now put x=2

2+8=10

10=10

It is true so x=2

(ii) x-3=5

Put x= 2

2-3=5

-1=5

It is not true

Now put x= 8

8-3=5

5=5

It is true so x=8

{iii) 15-x=3

Put x= 10

15-10 =3

5=3

It is not true

Now put x=12

15-12=3

3=3

It is true so x=12