Question

Aflati x din egalitate
(3X-1)*20=280

Answer 1

(3x-1)=280:20
3x-1=14
3x=14/+1
3x=15/:3
x=5

Answer 2

$(3x - 1) * 20 = 280 \\ 3x - 1 = 280 : 20 \\ 3x - 1 = 14 \\ 3x = 14 + 1 \\ 3x = 15 \\ x = 15 : 3 \\ x = 5$