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Vinil7 [7]
2 years ago
9

How do you do this?? I don’t understand at all

Mathematics
2 answers:
AlladinOne [14]2 years ago
7 0

X=5 becuase if 7*3=21 then x*3=15 and 5 times 3 = 15



So the answer is 12

Rus_ich [418]2 years ago
4 0

so i believe that 21 shrinks down to 7 and then you find what multiplication can make 7 to 21 and the answer is 3 because of 7*3=21

then  you do the same to the other side which is 15 but instead you divide by 3 which gives you 5 so

x=5

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