solving mathematics problems

Topic: MATH

explain all the rules needed to calculate fractions, (including how to change a fraction into percentage and vice versa) and

equations What are the main rules to know to resolve an equation?

exercice 1 (explain as much as you can how you get the result):
one hundred and six people were stopped in the street and the following information obtained: 62 were born in this country ,

50 were taller than 1.6m and 14 were left-handed.

If 3 people were taller than 1.6m, born n this country and left-handed, how many people were only one of these things?

what percentage of those born in this country were left-handed?

there are 3 people who are left-handed, born in England and taller than 1.6m, 2 people who are left-handed and taller than

1.6m. there are twice as many people who are just eft-handed as are left-handed and born in England. How many people are just

left-handed?

calculate and find x/Y:

3X +2Y=1285

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