jawabyah beserta caranya

x + y = 59         
2x + 4y = 166   
-> kali 2 = 2x + 2y = 118
-> kali 1=  2x + 4y = 166  dikurang
= -2y = - 48
= y = 24 (kendaraan roda 4 ada 24 buah)
tandai jawaban terbaik y

Misal roda 2=a; roda 4=b
Jml kendr => a + b = 59 => x2
Jml roda => 2a+ 4b= 166
------------------ _
2a + 2b = 118
2a + 4b = 166
-------------------- _
-2b = -48
b = 48/2
b = 24 => a+b=59
a=59-24
a=35
Roda 2=35
Roda 4=24