exam Maths Puzzle Numerical Ability

Fast Food. If four out of five doctors prefer fast food, then at a convention of 445 doctors, how many prefer fast food?

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exam Other Question

In the book it asks me him to traslante this:

5x

Z4

y + 5

2(w + 1)

x3 - 2

(x - 2) Can someone help me on this?

I need to solve: 7x - 5 = 6x

Thanks,
Lyn