问题
解答题
求未知数X.
1717+X=2809X×72=729660÷X=420.
答案
(1)1717+X=2809,
1717+X-1717=2809-1717,
x=1092;
(2)X×72=72,
X×72÷72=72÷72,
x=1;
(3)9660÷X=420,
9660÷X×x=420×x,
9660÷420=420x÷420,
x=23.
求未知数X.
1717+X=2809X×72=729660÷X=420.
(1)1717+X=2809,
1717+X-1717=2809-1717,
x=1092;
(2)X×72=72,
X×72÷72=72÷72,
x=1;
(3)9660÷X=420,
9660÷X×x=420×x,
9660÷420=420x÷420,
x=23.