Question

отмечу как лучший
х+ 3х-9/5 = 11 - 5х-12/3

Answer 1

3х+5х+х=11-(12/3)*5+(9/5)*3
9х=11-60/15+ 27/15
9х=11-33/15
9х=8 12/15
9х=132/15
х=14 6/15
х= 14 2/5

Answer 2

4x-9/5=7-5x
4x-9/5=20x/5-9/5
20x/5-9/5=7-5x
5(20x-9)/5=5(7-5x)
20x-9=5(7-5x)
20x-9=35-25x
25+20x-9=(25x-25x)+35
25x+20x-9=35
45x-9=35
45x=44
x=44/45