问题
解答题
求未知数x.
x+36=98
x-45=63
4.5+x=27.3
2x-17=42.
答案
(1)x+36=98,
x+36-36=98-36,
x=62;
(2)x-45=63,
x-45+45=63+45,
x=108;
(3)4.5+x=27.3,
4.5+x-4.5=27.3-4.5,
x=22.8;
(4)2x-17=42,
2x-17+17=42+17,
2x=59,
2x÷2=59÷2,
x=29.5.