问题
解答题
解方程.
2X+3×0.9=24.70.3:X=17:51.
答案
(1)2X+3×0.9=24.7,
2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
2x÷2=22÷2,
x=11;
(2)0.3:X=17:51,
17x=0.3×51,
17x=15.3,
17x÷17=15.3÷17,
x=0.9.
解方程.
2X+3×0.9=24.70.3:X=17:51.
(1)2X+3×0.9=24.7,
2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
2x÷2=22÷2,
x=11;
(2)0.3:X=17:51,
17x=0.3×51,
17x=15.3,
17x÷17=15.3÷17,
x=0.9.