Set method, often confused with assumption, because the total value is given.
Students need to differentiate between the 2 by noticing that the total quantities of both items were not given, hence not able to "assume".
Such "Set" questions often appear in Paper 2 of P5 exam papers.
Calculator usage is allowed.
More of such P5 set questions here.
Greg bought 5 times as many toy cars as toy trucks.
Each toy car costs $2 and each toy truck costs $5.
He spent a total of $120 of all the toy cars and toy trucks.
How many toy cars did Greg buy?
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