186k views
5 votes
13-21

FOR 50 PTS PLEASE ASAP

13-21 FOR 50 PTS PLEASE ASAP-example-1

2 Answers

4 votes
20-4x=4
X= -4

Sorry. I’m not sure abt 21
User Lonami
by
7.8k points
0 votes

Answer:

13. 6

14. -2

15. 3/5

16. -3

17. 24

18. 4

19. 7

20. 0.80

21. 5.5


Explanation:

13. 4x-20=4

4x=20+4

x=24/4

x=6


14. 9x + 17 = -1

9x = -1 + -17

x = -18 / 9

x = -2


15. 2x-12 = 7x - 15

2x = 7x -15+12

2x = 7x -3

2x-7x = -3

-5x = -3

x= -3/-5

Note: The minus will cancel themselves out

x= 3/5


16. 6x + 10 = x-5

6x = x - 5 - 10

6x-x = -15

5x = -15

x = -15 / 5

x = -3


17. x+6 *4 = 44

x + 20 = 44

x = 44 - 20

x = 24


18. (x - 1) + x + 5 = 12

x - 1 + x = 12 - 5

X - 1 + x = 7

x + x = 7 + 1

2x = 8

x = 8/2

x = 4


19. 2(3x - 9 + x) = 38

6x - 18 + 2x = 38

6x + 2x = 56

8x = 56

x = 56/8

x = 7


20. 12/ 0.80 = 15 Units


21. 6x + 6*4 = 4x * 9

6x + 6 = 4x * 9/4

6x - 4x + 6 = 9/4

6x = 4x - 11

6x - 4x = - 11

2x = -11

x = -11/2

x= -5.5


User JPNotADragon
by
8.2k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories