Tolong bantu ya....pakai jalan

7.
3(x-3)/15 + 5(2x+1)/15=22/15
(3x-9)/15 + (10x+5)/15=22/15
(3x+10x-9+5)/15=22/15
(13x-4)/15=22/15
13x-4=22/15 . 15
13x-4=22
13x=22+4
13x=26
X=26/13
X=2

Jawabannya D

Semoga Bermanfaat SlmRe

7) 
(x-3)/5 + (2x+1)/3 = 1 7/15
3(x-3)/15 + 5(2x+1)/15 = 22/15
(3x-9)/15 + (10x+5)/15 = 22/15
(3x-9+10x+5)/15 = 22/15
(13x-4)/15 = 22/15
13x/15 -4/15 = 22/15
13x/15 = 22/15 +4/15
13x/15 = 26/15
190x = 390
x = 390/195
x = 2