[tex](a + b + c) \div 3 = 8 \: | \times 3[/tex]
[tex]a + b + c = 24[/tex]
[tex](b + c) \div 2 = 10.5 \: | \times 2[/tex]
[tex]b + c = 21[/tex]
[tex]a = \frac{1}{4} \times c[/tex]
[tex]a = \frac{c}{4} [/tex]
[tex]a + b + c = 24[/tex]
[tex] \frac{c}{4} + 21 = 24[/tex]
[tex] \frac{c}{4} = 24 - 21[/tex]
[tex] \frac{c}{4} = 3[/tex]
[tex]c = 4 \times 3[/tex]
[tex]c = 12[/tex]
[tex]a = \frac{c}{4} [/tex]
[tex]a = \frac{12}{4} [/tex]
[tex]a = 3[/tex]
[tex]b + c = 21[/tex]
[tex]b + 12 = 21[/tex]
[tex]b = 21 - 12[/tex]
[tex]b = 9[/tex]
