Jawabanmu

2014-08-19T18:55:11+07:00
Y+3y+4y+1 = 25 Y+3y +4y =25-1 8y = 24 Y = 24 : 8 = 3 Semoga brmanfaat..
2014-08-19T18:55:26+07:00

y + 3y + (4y+1) = 25
y+3y+4y+1 = 25
8y = 24 
 y =  24  = 3
        8
y=3
3y = 3(3) = 9
4y+1= 4(3) + 1 = 13