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2x+3y=10 (pers 2)
pers 1 -y=4-3x
y=3x-4
ganti nilai y pd persamaan 2 dg 3x-4
2x+3(3x-4)=10
2x+9x-12=10
11x=10+12
x=22/11
x= 2
pada pers y= 3x-4 ganti x dg 2
y=3(2)-4
y=6-4
y=2
lakukan hal yg sama untuk soal yg lainya