Answer:
x= 4 and y= 2
Explanation:
3x+3y= 18 (1)
2y= x (2)
from (1):
x+y= 6
y= 6-x (3)
sub (3) into (2):
2(6-x)= x
12-2x= x
-3x= -12
x= 4 (4)
sub (4) into (3):
y= 6-4
= 2
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