问题
解答题
解方程:
X-0.8X=22
2X+0.9×3=24.7.
答案
(1)x-0.8x=22,
0.2x=22,
0.2x÷0.2=22÷0.2,
x=110;
(2)2x+0.9×3=24.7,
2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
2x÷2=22÷2,
x=11.
解方程:
X-0.8X=22
2X+0.9×3=24.7.
(1)x-0.8x=22,
0.2x=22,
0.2x÷0.2=22÷0.2,
x=110;
(2)2x+0.9×3=24.7,
2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
2x÷2=22÷2,
x=11.