Question

Voi dau follow și stea ​

Answer 1

Explicație pas cu pas:

a) 1,5 + 3 = a

a= 4,5

b) 2/3 - 1 = a

a = (2-3)/3 = - 1/3

c) 2/3 × 3/5 - 1/2 = a

a = 6/15 - 1/2 = 2/5 - 1/2 = (4-5)/10 = - 1/ 10

d) 0,2 × 10/3 - 1/5 = 2/3 a

2/3 a = 2/10 × 10/3 - 1/5

2/3a = 2/3 - 1/5

2/3 a = (10-3)/15

2/3 a = 7/15

a = 7/15 : 2/3

a = 7/ 15 × 3/2

a = 7/10