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OpenStudy (drewkatski):
A ferry cannot hold more than 30 tonnes. If it holds x cars weighing 1 tonne each and y lorries weighing 3 tonnes each, write down an inequality in x and y.
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OpenStudy (anonymous):
Since the weight of each of them added together has to be 30 or less, you can say \[x+3y \le30\]
OpenStudy (drewkatski):
ok thankyou, thats it though? Isn't there some calculation or something?
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