Question

6x+3=9 18+5x＝21 4x-2＝10 8x-4×14=0 5x-39＝56 7x÷3＝8

6x+3=9
18+5x＝21
4x-2＝10
8x-4×14=0
5x-39＝56
7x÷3＝8.19
解方程，用最简单的方法

Answer 1

6x+3=9
6x=9-3
6x=6
x=1

18+5x＝21
5x=21-18
5x=3
x=0.6

4x-2＝10
4x=10+2
4x=12
x=3

8x-4×14=0
8x=56
x=7

5x-39＝56
5x=39+56
5x=95
x=19

7x÷3＝8.19
x=8.19x3÷7
x=3.51

Answer 2

1.6x+3=9
6x=6
x=1
2.18+5x＝21
5x=3
x=0.6
3.4x-2＝10
4x=12
x=3
4.8x-4×14=0
8x=56
x=7
5.5x-39＝56
5x=95
x=19
6.7x÷3＝8.19
7x=8.19*3
x=1.17*3
x=3.51

Answer 3

1. 6x+3=9

   6x=6

   x=1

2. 18+5x＝21

   5x=21-18

   5x=3

   x=3/5

3. 4x-2＝10

   4x=12

   x=3

4. 8x-4×14=0

   8x=56

   x=7

5. 5x-39＝56

   5x=95

   x=19

6. 7x÷3＝8.19

   7x=24.57

   x=3.51

Answer 4

6x+3=9
18+5x＝21
4x-2＝10
8x-4×14=0
5x-39＝56
7x÷3＝8.19