18 equation questions! Someone help! Solve what the letter is?

Question

1. 7m+5=3

2. 40=6v-14

3. 25c-7=68

4.1=7v-20

5. 7s+ 0.4=1.8

6. 5z-9=26

7.11n-4=62

8. 32=12p+8

9. 43=12d -17

10. 50=13r + 11

11. 33.5=9t-2.5

12. 4b+3.6=12

13.12w-6=90

14.14y+4=74

15. 6t-30=0

16. 45=20n-35

17.3m+0.15=0.24

18. 14.1=9s-18.3

19. 6m-15=27
6m-15+15=27+?
6m=?
6m/6=42/?
m=?

20. 9w +7=52
9w+7-?=52-7
9w=45
9w/?=45/9
w=?

21. 3.1=5x-1.9
5x-?=3.1
5x-1.9+?=3.1+1.9
5x=?
x=?

Answer 1

1. m=– 2/7
2. v=9
3. c=3
4. v=3
5. s=0.2
6. z=7
7. n=6
8. n=2
9. d=5
10. r=3
11. t=4
12. b=2.1
13. w=8
14. y=5
15. t=5
16. n=4
17. m=0.3
18. s=3.6
19. 6m-15+15=27+15
6m=42
6m/6=42/6
m=7
20. 9w+7-7=52-7
9w=45
9w/9=45/9
w=5
21. 5x-1.9=3.1
5x-1.9+1.9=3.1+1.9
5x=5
x=1

Answer 2

1. 7m+5=3 7m+5-5=3-5 7m=-2 m=-2/7
2.40=6v-14 40+14=6v-14+14 54=6v 9=v
3.25c-7=68 25c-7+7=68+7 25c=75 c=3
4. 1=7v-20 1+20=7v-20+20 21=7v 3=v
5. 7s +0.4=1.8 7s+0.4- 0.4=1.8-0.4 7s=1.4 s=0.2
6. 5z-9=26 5z-9+9=26+9 5z=35 z=7
7. 11n-4=62 11n-4+4=62+4 11n=66 n=6
8.32=12p+8 32-8=12p+8-8 24=12p 2=p
9. 43=12d-17 43+17=12d-17+17 60=12d 5=d
10. 50=13r+11 50=13r+11-11 39=13r 3=r
11. 33.5=9t-2.5 33.5+2.5=9t-2.5+2.5 36=9t 4=t
12. 4b+3.6=12 4b+3.6-3.6=12-3.6 4b=8.4 b=2.1
13. 12w-6=90 12w-6+6=90+6 12w=96 w=8
14. 14y+4=74 14y+4-4=74-4 14y=70 y=5
15. 6t-30=0 6t-30+30=0+30 6t=30 t=5
16. 45=20n-35 45+35=20n-35+35 80=20n 4=n
17. 3m+0.15=0.24 3m+0.15-0.15=0.24-0.15 3m=0.09 m=0.03
18. 14.1=9s-18.3 14.1+18.3=9s-18.3+18.3 32.4=9s 3.6=s
19.6m-15=27 6m-15+15=27+15 6m=42 m=7
20. 9w+7=52 9w+7-7=52-7 9w=45 w=5
21. 3.1=5x-1.9 3.1+1.9=5x-1.9+1.9 5=5x 1=x

Answer 3

1) 7m +5 =3
7m+5-5= 3-5
7m=-2
m=-2/7

2) 40=6v-14
50+14=6v
64=6v
64/6=v

do the rest :) homework is good. :P

Answer 4

Its useful for you to do these yourself.
Take all letters to the left and numbers to the right.
Remember change side, change sign.