Question

media aritmetica a doua numere este 35. Un numar este de 3 ori celalalt nr. Aflati cele doua nr.

Answer 1

(a+b)÷2=35
a= 3×b
a+b= 70( 35×2)
3×b+b= 70
4×b= 70
b= 70 ÷ 4
b= 17.5
a= 17.5 ×3
a=52.5

Answer 2

[tex] M_{a} = \frac{a+b}{2} =35 \\ \\ a=3*b \\ \\ a+b=2*35 \\ \\ a+b=70 \\ \\ 3b+1b=70 \\ \\ 4b=70 \\ \\ b=70:4 \\ \\ b=17,5 \\ \\ a=17,5*3 a=52,5 \\ \\ Verificare : \\ \\ 17,5+52,5=50 \\ \\ M_{a} = \frac{17,5+52,5}{2} = \frac{70}{2} =35 \\ \\ Succes ![/tex]