问题
解答题
(1)40%X-0.8=1.2
(2)2X-60%X=4.2.
答案
(1)40%X-0.8=1.2,
40%X-0.8+0.8=1.2+0.8,
40%X=2,
40%X40%=2÷40%,
X=5;
(2)2X-60%X=4.2,
1.4X=4.2,
1.4X÷1.4=4.2÷1.4,
X=3.
(1)40%X-0.8=1.2
(2)2X-60%X=4.2.
(1)40%X-0.8=1.2,
40%X-0.8+0.8=1.2+0.8,
40%X=2,
40%X40%=2÷40%,
X=5;
(2)2X-60%X=4.2,
1.4X=4.2,
1.4X÷1.4=4.2÷1.4,
X=3.