幫我解方程,THX~~~(寫埋式)

1.5=9+6-2x
5-9-6=-2x
-10=-2x
x=5//

2.4+3n-12=25
3n=25+12-4
3n=33
n=11//

3.11-7y+3=-7
-7y=-7-3-11
-7y=-21
y=3//

4.5h+1-4h=10
h=10-1
h=9//

6.6m-11m+2=22
-5m=22-2
-5m=20
m=-4//

7.19-7b-5b=-53
-12b=-53-19
-12b=-72
b=6//

1) 5=9+6-2x
2x=9+6-5
2x=10
x=5

2) 4+3n-12=25
3n=25-4+12
3n=33
n=11

3) 11-7y+3=(-7)
11+3+7=7y
21=7y
y=3

4) 5h+1-4h=10
h+1=10
h=10-1
h=9


6) 6m-11m+2=22
-5m+2=22
-5m=20
m=-4

7) 19-7b-5b=-53
19+53=7b+5b
72=12b
b=6

1.
5=9+6-2x
5=15-2x
2x=15-5
2x=10
x=5

2.
4+3n-12=25
3n=25-4+12
3n=33
n=11

3.
11-7y+3=-7
11+3+7=7y
21=7y
3=y
y=3

4.
5h+1-4h=10
5n-4n=10-1
n=9

6.
6m-11m+2=22
6m-11m=22-2
-5m=20
-m=4
m=-4

7.
19-7b-5b=-53
19+53=7b+5b
72=12b
6=b
b=6







Too easy!

(1)

5=9+6-2x
2x=9+6-5
2x=10
x=5

(2)

4+3n-12=25
3n=25-4+12
3n=33
n=11

(3)

11-7y+3=-7
-7y=-7-11-3
-7y=-21
y=3

(4)

5h+1-4h=10
5h-4h=10-1
h=9

(6)

6m-11m+2=22
-5m=22-2
-5m=20
m=-4

(7)

19-7b-5b=-53
-12b=-53-19
-12b=-72
b=6

1.
5=9+6-2X
5-9-6=-2X
-10=-2X
X=5
2.
4+3N-12=25
3N=25+12-4
N=33/3
N=11
3.
11-7Y+3=-7
11+3+7=7Y
Y=3
4.
5H+1-4H=10
H=10-1
h=9
6(冇第5題?)
6m-11m+2=22
2-22=5m
-20=5m
m=4-
7.
19-7b-5b=-53
-12b=-53-19
-12b= -72
b=6