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2x+y= 29
2x=36
x= 36/2
x= 18
x-y=7
18-y=7
-y=7-18
-y=-11
y=11
2x+y=29 | 1x= 2x+y=29 - = y =29 -
-3y = - 15
y= - 15/- 3
y = 5
x-y=7
x-5=7
x=7+5
x= 12
jadi,hasil penyelesaiannya adalah (12,5)