Question

answer for the question d,e,f​

Answer 1

Answer:

(d) 7(x-6)

(e) x=3

(f)  13

step by step explanation

(d) 7x - 42  

= 7(x) - 7(6 )

= 7(x-6)

Thus,

7x -42 = 7(x-6)

(e) 5x+9 = 5+3x

= 5x-3x = 9-3

= 2x = 6

x = 3

(f) √169 by Repeated subtraction:

1. 169 - 1 = 168

2. 168 - 3 = 165

3. 165 - 5 = 160

4. 160 - 7 = 153

5. 153 - 9 = 144

6. 144 - 11 = 133

7. 133 - 13 = 120

8. 120 - 15 = 105

9. 105 - 17 = 88

10. 88 - 19 = 69

11. 69 - 21 = 48

12. 48 - 23 = 25

13. 25 - 25 = 0

We get 0 at 13th step. Hence,13 is the square root of 169

 √169=13

                                                                                                                                 

hope it helps you

Answer 2

D)7x-42

sol-7 is common

7 (x-6)

e)5x+9=5+3x

sol-5x-3x=9-5

2x=4

x=4/2

x=2

f)169

sol-169-1

168-3

165-5

160-7

153-9

144-11

133-13

120-15

105-17

88-19

69-21

48-23

25-25

0

I hope it will help u