Tolpng bantu darurat

1]
2a = -10
<=> a = -10/2
<=> a = -5

2]
2a - 10 = 30
<=> 2a = 30 + 10
<=> 2a = 40
<=> a = 40/2
<=> a = 20

3]
1/2 a - 10 = 25
<=> 1/2 a = 25 + 10
<=> 1/2 a = 35
<=> a = 35/(1/2)
<=> a = 35 × 2/1
<=> a = 70/1
<=> a = 70

4]
3/2 a - 5 = -1/2 a + 10
<=> 3/2 a + 1/2 a = 10 + 5
<=> 4/2 a = 15
<=> 2a = 15
<=> a = 15/2
<=> a = 7 1/2

5]
6a - 10 = 30 - 14a
<=> 6a + 14a = 30 + 10
<=> 20a = 40
<=> a = 40/20
<=> a = 2