Question

10•(d+12)=130 помогите пожалуйста

Answer 1

10d + 120 = 130
10d = 130 -120
10d = 10
d = 10/10
d = 1

Answer 2

10(д+12)=130
д+12=130÷10
д+12=13
д=13-12
д=1