Răspuns:
1000
Explicație pas cu pas:
[tex]d = \frac{2}{5} \times c = \frac{2c}{5} \\ [/tex]
[tex]d = b - 75[/tex]
[tex]b = \frac{6}{10} \times c = \frac{3}{5} \times c = \frac{3c}{5} [/tex]
D=b-75=>
3c/5 - 2c/5=75 /×5
3c-2c=375
C=375
D=2*375/5= 2*75= 150
B=3*375/5 = 3*75= 225
[tex]a = \frac{2}{3} \times (b + d) = \frac{2}{3} \times ( \frac{3c}{5} + \frac{2c}{5} ) = \frac{2}{3} \times \frac{5c}{5} = \frac{2}{3} \times c = \frac{2c}{3} [/tex]
a= 2*375/3 =2*125= 250
a+b+c+d= 250+225+150+375= 1000
