Question

Nr 3 x 5 sunt direct proportionale cu y 54 45. Calculati x plus y si y-x
dar vreau sa pricep de ex cum se afla in cazul: det. Nr.. a, b Stiind ca sunt d. P. Cu 5 si 8 iar dif lor = 45

Answer 1

3/y=x/54=5/45
x=5*54/45=6
y=3*45/5=27
x+y=6+27=33
y-x=27-6=21


a/5=b/8          b=8a/5
b-a=45
8a/5-a=45
8a-5a=225
3a=225
a=75
b=8*75/5=120