數學方程(要有齊步驟 驗算!!!!!!!!!!!!!!)

1. 40-12.9m= 14.2
-12.9m= 14.2-40
-12.9m= -25.8
m= -25.8/-12.9
m=2
驗算:40-12.9x2
=40-25.8
=14.2

2.x/6-8=13
x/6=13-8
x/6=5
x=6x5
x=30

3.101-t/4=86
-t/4=86-101
-t/4= -15
t= -15x-4
t=60

4.4+f/9=7
f/9=7-4
f/9=3
f=3x9
f=27

5.4x+9=17
4x=17-9
4x=8
x=8/4
x=2
驗算:4x2+9
=8+9
=17

1. 40-12.9m=14.2
40-12.9m - 40 = 14.2 - 40
-12.9m = -25.8
m = 25.8 / 12.9
m = 2
步驟驗算:
40-12.9 x2 = 40- 25.8 =14.2

2. x/6 -8=13
x/6 -8 8= 13 8
x/6 = 21
x/6x6 =21x6
x=126
步驟驗算:
126/6 - 8= 21 - 8 = 13


3. 101-t/4= 86
101-t/4 -101= 86-101
-t/4=-15
t/4 x 4 = 15 x 4
t = 60
步驟驗算:
101- 60/4 = 101- 15 = 86


4. 4 +f/9 = 7
4 +f/9 -4 = 7 -4
f/9 = 3
f/9 x 9 = 3 x9
f = 27
步驟驗算:
4 + 27/9 = 4 + 3 = 7


5. 4x +9= 17
4x +9 -9= 17-9
4x = 8
4x x 1/4= 8 x 1/4
x = 2
步驟驗算:
4 x2 +9 = 17

1.)步驟: 40-12.9m=14.2

40=14.2+12.9m

40-14.2=12.9m

25.8=12.9m

25.8
-----=m
12.9

m=2(答案)

1)驗算:40-12.9m=14.2

40-12.9x2=14.2

40-25.8=14.2

2)步驟:6分之x -8 =13

x/6-8=13

x
--=13+8
6

x
--=21
6

x=21x6

x=126(答案)

3.)步驟:101- 4分之t =86

101-t/4=86

101=86+t/4

101-86=t/4

15x4=t

t=60(答案)

4.)步驟: 4+9分之f =7

4+f/9=7

f/9=7-4

f/9=3

3x9=f

27=f(答案)

5.)步驟:4x+9=17

4x=17-9

4x=8

x=8/4

x=2

驗算:4x+9=17

4x2+9=17

8+9=17

~完成~

2.) X/6 - 8 = 13
X/6 = 13 + 8
X = (13+8) x 6
X = 126

1.) 40 - 12.9M = 14.2
-12.9M = 14.2-40
-M = (14.2-40) / 12.9
-M = -2
M = 2

3.) 101 - T/4 = 86
- T/4 = 86 - 101
- T = (86 - 101) x 4
- T = - 60
T = 60

4.) 4 + F/9 = 7
F/9 = 7 - 4
F = (7 - 4) x 9
F = 27

5.) 4X + 9 = 17
4X = 17 - 9
X = (17 - 9) / 4
X = 2