问题
解答题
解方程.
45+X=17621-3.2X=5.64.
答案
(1)45+X=176,
45+X-45=176-45,
x=131;
(2)21-3.2X=5.64,
21-3.2X+3.2x=5.64+3.2x,
21-5.64=5.64+3.2x-5.64,
15.36=3.2x,
15.36÷3.2=3.2x÷3.2,
x=4.8.
解方程.
45+X=17621-3.2X=5.64.
(1)45+X=176,
45+X-45=176-45,
x=131;
(2)21-3.2X=5.64,
21-3.2X+3.2x=5.64+3.2x,
21-5.64=5.64+3.2x-5.64,
15.36=3.2x,
15.36÷3.2=3.2x÷3.2,
x=4.8.