2+2x*0.7>2x*0.8怎么解
问题描述:
2+2x*0.7>2x*0.8怎么解
答
2+1.4x>1.6x
移项
1.6x-1.4x<2
0.2x<2
x<2÷0.2
x<10
答
2+2x×0.7>2x×0.8
2+1.4x>1.6x
1.6x-1.4x<2
0.2x<2
x<10
答
2>2x×(0.8-0.7)
2>2x×0.1;
0.2x<2;
∴x<10;
如果本题有什么不明白可以追问,
答
2+2x×0.7>2x×0.8
2+1.4x>1.6x
1.6x-1.4x<2
0.2x<2
x<10
不明白可追问,祝学习进步!