问题
解答题
x+4=8.5
7y-3y=12
5a+3a=4.8.
答案
(1)x+4=8.5,
x+4-4=8.5-4,
x=4.5;
(2)7y-3y=12,
4y=12,
4y÷4=12y÷4,
y=3;
(3)5a+3a=4.8,
8a=4.8,
8a÷8=4.8÷8,
a=0.6.
x+4=8.5
7y-3y=12
5a+3a=4.8.
(1)x+4=8.5,
x+4-4=8.5-4,
x=4.5;
(2)7y-3y=12,
4y=12,
4y÷4=12y÷4,
y=3;
(3)5a+3a=4.8,
8a=4.8,
8a÷8=4.8÷8,
a=0.6.