问题
解答题
求未知数x.
10.6-x=1.24x÷0.8=2.50.7×x=17.5.
答案
(1)10.6-x=1.24,
10.6-x+x=1.24+x,
10.6-1.24=1.24+x-1.24,
x=9.36;
(2)x÷0.8=2.5,
x÷0.8×0.8=2.5×0.8.
x=2;
(3)0.7x=17.5,
0.7x÷0.7=17.5÷0.7,
x=25.
求未知数x.
10.6-x=1.24x÷0.8=2.50.7×x=17.5.
(1)10.6-x=1.24,
10.6-x+x=1.24+x,
10.6-1.24=1.24+x-1.24,
x=9.36;
(2)x÷0.8=2.5,
x÷0.8×0.8=2.5×0.8.
x=2;
(3)0.7x=17.5,
0.7x÷0.7=17.5÷0.7,
x=25.