Answer:
The number is 7.
Step-by-step explanation:
4n - 7 = 21 Add 7 on both sides
4n = 28 Isolate the variable by dividing 4 on both sides
n= 7
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Answer:
Let x and y be the two positive integers the Christopher is thinking.
x is equal to 7
and y =20
It would be 12% of 50
50 * 12/100 = 600/100 = 6
so, 6 cars are red