How many minutes does 1200m take? 1200÷600=2 (minutes).
2. x+x+y =18 x+y =12 so 18+ 12=30, that is, 3 X plus 3 y.
1 x plus 1 y: 30 ÷ 3 = 10.
X is equal to: 18- 10=8.
Y is equal to: 12- 10=2.
3.(x+y)÷3 = 6(x+z)÷5 = 6(y+z)÷2 = 12。
x+y= 18 x+z=30 y+z=24
18+30+24=72, which means 2 x, 2 y, 2 z.
X+y+z equals: 72÷2=36.
X equals: 36-24= 12.
Y equals: 36-30=6.
Z equals: 36 18= 18.
4. unit price × quantity = total price ax yuan