问题
解答题
解方程.
6X-30=24×20.75X-3×0.8=02X:0.6=0.9:3.
答案
(1)6x-30=24×2,
6x-30=48,
6x-30+30=48+30,
6x=78,
6x÷6=78÷6,
x=13;
(2)0.75x-3×0.8=0,
0.75x-2.4=0,
0.75x-2.4+2.4=0+2.4,
0.75x÷0.75=2.4÷0.75,
x=3.2;
(3)2x:0.6=0.9:3,
6x=0.6×0.9,
6x÷6=0.54÷6,
x=0.09.