Question

реши уравнение 15×(r-0,2)=21

Answer 1

15×(r-0,2)=21

15r-3=21

15r=21+3

15r=24

r=24:15

r=1,6

Answer 2

15(r - 0,2) = 21
15r - 3 = 21
15r = 21 + 3
15r = 24
r = 24 : 15
r = 1,6