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2 years ago

PLEASE HELP ASAP!!!!!!!!!!!!!

Mathematics

1 answer:

Step2247 [10]2 years ago

5 0

Answer

12. x = 15, y = 21

13. x = 10, M = 37, N = 84, P =59

14. x = 19, R = 43, S = 20, T = 117

15. A = 21, B = 125, C = 34

16. J = 48, K = 57, L = 75

Explanation

12. 6x - 11 + x + 5 + 81 = 180

7x + 75 = 180

7x = 105

x = 15

4y - 18 + y + 14 + 6*15 - 11 = 180

5y + 75 = 180

5y = 105

y = 21

13. 4x - 3 + 9x - 6 + 6x - 1 = 180

19x - 10 = 180

19x = 190

x = 10

M = 4*10 - 3 = 37

N = 9*10 - 6 = 84

P = 6*10 - 1 = 59

14. R = 2x + 5

S = x + 1

T = 7x - 16

2x + 5 + x + 1 + 7x - 16 = 180

10x - 10 = 180

10x = 190

x = 19

R = 2*19 + 5 = 43

S = 19 + 1 = 20

T = 7*19 -16

15. A = C -13

B = 4C - 11

c - 13 + 4c - 11 + c = 180

6c -24 = 180

6c = 2-4

C = 34

A = 34 - 13 = 21

B = 4*34 - 11 = 125

16. K = J + 9

L = 2J -21

j + 9 + 2j - 21 + j = 180

4j -12 = 180

4j = 192

J = 48

K = 48 + 9 = 57

L = 2*48 -21 = 75

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