log 5 (7x+3) =2
одз 7x + 3 > 0 x > -3/7
5² = 7x + 3
25 - 3 = 7x
7x = 22
x = 22/7 = 3 1/7
35х+15=2
35х=2-15
35х=-13
х=-13/35
log 5 (7x+3) =2
одз 7x + 3 > 0 x > -3/7
5² = 7x + 3
25 - 3 = 7x
7x = 22
x = 22/7 = 3 1/7
35х+15=2
35х=2-15
35х=-13
х=-13/35