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(9x+21y)-(2x+18y)=22
-x-5y =30. kali -7. 7x+35y=-210
7x+3y =22. kali 1. 7x+3y=22
------------------- -
32y = -232
y = 7,25
-x-5y =30
-x -5(7,25) =30
-x-36,25=30
-x =66,25
x=-66,25
mhn maaf klo slh