Question

520:(3х+1)=13*11-13=?

Answer 1

Ответ:

520:(3x+1) = 13*11 - 13

520/(3x+1) = 143 - 13

520/(3x+1) = 130

3x + 1 = 520/130

3x + 1 = 4

3x = 4 - 1

3x = 3

x = 3/3

x = 1