设做1条裤子用布x米,则做1件上衣用布(x+0.4)米,
由题意得:
6x+0.4=(x+0.4)×4+1,
6x+0.4=4x+1.6+1,
6x+0.4=4x+2.6,
6x-4x=2.6-0.4,
2x=2.2,
x=1.1;
6×1.1+0.4=7(米);
答:这块布料共有7米.
设做1条裤子用布x米,则做1件上衣用布(x+0.4)米,
由题意得:
6x+0.4=(x+0.4)×4+1,
6x+0.4=4x+1.6+1,
6x+0.4=4x+2.6,
6x-4x=2.6-0.4,
2x=2.2,
x=1.1;
6×1.1+0.4=7(米);
答:这块布料共有7米.