If two dozen pencils cost 12 dollars then ,........pencils cost 2 dollars.
Có trên toán quốc tế, giải giúp mình nhé!
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nếu có hai ta bút chì,giá là 12 đô la thì giá là 2 đô là thì có? bút chì?
2 tá=24 chiếc
giá một chiếc:24:12=2(đô la)
có số bút chì là:2:2=1(chiếc)
TICk mình nha!!!
Hint: Supppose that Darwin bought x eraser boxes, then he bought \(\frac{4}{5}x\) pencil boxs. (\(x\in N,x>0\)
Because Darwin spent 240 dollars so we have equation:
\(4x+\left(4+6\right).\frac{4}{5}x=240\)
\(\Rightarrow12x=240\Rightarrow x=20\)
So Darwin bought 20 eraser boxes and 16 pencil boxes.
Have a good time :))
we have : 5cs=9$
inferred 10cs = 9/5 x10
= 18( $)
the next time you write in Vietnamese !!!
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Đề tự dịch: Mười hai cây bút giá 24,6 đô-la. Hỏi giá của một một cây bút là bao nhiêu?
Vậy giá 1 cây bút là
24,6 : 12 = 2,05 đô-la
A dozen pens = 1 tá bút mực = 12 cái bút mực
=> 12 cái bút mực có giá 24.6 dollars.
Vậy một cái bút có giá là: 24.6 : 12 = 2.05 dollars.