四年级下册数学书滴108页的答案

Question

要方程，还要解方程！ 1.题目以下：
2x-x=4 5y+y=96 x+3x=7 4m-2m=48 y+y=33 5x-2x=123
y=3y=36 6x-3x=4.8 3m+2m=65
y=3y=36这道题目打错了,是y+3y=36

Answer 1

2x-x=4
(2-1)x=4
x=4

5y+y=96
(5+1)y=96
6y=96
6y/6=96/6
y=16

4m-2m=48
(4-2)m=48
2m=48
2m/2=48/2
m=24

y+y=33
2y=33
2y/2=33/2
y=16.5

5x-2x=123
(5-2)x=123
3x=123
3x/3=123/3
x=41

y=3y=36???怀疑这道题目打错了

6x-3x=4.8
(6-3)x=4.8
3x=4.8
3x/3=438/3
x=1.6

3m+2m=65
(3+2)m=65
5m=65
5m/5=65/5
m=13本回答被提问者采纳

Answer 2

2x-x=4 5y+y=96 x+3x=7 4m-2m=48 y+y=33
解 X=4 6y=96 4x=7 2m=48 2y=33
y=96/6 x=7/4 m=48/2 y=33/2
y=16 x=1.75 m=24 y=16.5
5x-2x=123 6x-3x=4.8 3m+2m=65
3x=123 3x=4.8 5m=65
x=123/3 x=4.8/3 m=65/5
x=41 x=1.6 m=13

Answer 3

2x-x=4 5y+y=96 x+3x=7 4m-2m=48 y+y=33 5x-2x=123
解;x=4 6y=96 4x=7 2m=48 2y=33 3x=123
y=16 x=1.75 m=24 y=16.5 x=41