Question

Oblicz(równania) 1/9-jedna dziewiąta i tak dalej

1/9z+7=2

4/5x-4=0

2/7*a+10=-2

Answer 1

1/9z+7=2

 1/9z = 2 - 7

1/9z = -5     

z = -5 :1/9

z = -5 * 9/1

z = -45

 

 

4/5x-4=0

 4/5x = 4

x = 4 : 4/5

x = 4 * 5/4

x = 5

 

2/7*a+10=-2

2/7 * a = -2 - 10

2/7 * a = -12

a = -12 : 2/7

a = -12 * 7/2

a = - 42