Answer:
? = 36
Explanation:
42:7 = 6:1
18:3 = 6:1
?:6 = 6:1 6*6=36 ? = 36
36
>Ratio
42/7=x/6
>Cross multiply42(6)=7(x)252=7x
>Divide
x=252/7
x=36
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