Question

please solve this problem answer will be marked as brainlist​

Answer 1

Answer:

answer is 19.5 or similar to 20

Answer 2

Answer:

15x + 17y=21;. -1

17x+ 15y=11. -2

x+y=21

Step-by-step explanation:

multiplying eq. 1 by 17 and eq. 2 by 15

255x + 289y =357

_255x ±225y =_165

————————————

64y = 192

y = 3

putting value of y in eq.1

15x + 17(3) =21

15x+51=321

15x=270

x=18

x+y=18+3=21

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