Question

方程组4x+3m=2,8x-3y=m的解X.Y满足x大于y,则m的取值范围

Answer 1

4x+3m=2,

x=(2-3m)/4;

8x-3y=m;

3y=8x-m=2(2-3m)-m=4-7m;

y=(4-7m)/3;

∵x大于y

∴(2-3m)/4＞(4-7m)/3;

6-9m＞16-28m;

19m＞10;

m＞10/19;