(2x-1)/5+(3y-2)/4=2(3x+1)/3-(3y+2)/4=3/4

(2x-1)/5+(3y-2)/4=2(3x+1)/3-(3y+2)/4=3/4

(2x-1)/5+(3y-2)/4=2①
(3x+1)/3-(3y+2)/4=3/4②
1×20得:4(2x-1)+5(3y-2)=40即:8x+15y=54③
2×12得:4(3x+1)-3(3y+2)=9即:12x-9y=11④
3×3-4×2得:63y=140
y=20/9
y=20/9を4に変換:12x-20=11
12x=31
x=31/12
x=31/12
y=20/9