5X+3=11Y 2X+16=10Y
问题描述:
5X+3=11Y 2X+16=10Y
答
5X+3=11Y (1)
2X+16=10Y(2)
(1)x2得 10X+6=22Y (3)
(2)x5得 10X+80=50Y (4)
(4)-(3)得 28Y=74
Y=37/14
代入(1)得 5X+3=407/14
X=73/14a+b+-2分之1b=-2分之1b+1+4分之1a看不清楚