a + b + c = 297
a ÷ b = 2, r25 ⇒ a = 2b + 25 ⇒ b = (a-25)÷2
a ÷ c = 11, r8 ⇒ a = 11c + 8 ⇒ c = (a-8)÷11
~
a; b; c = ?
~
a + b + c = 297
a + (a-25)÷2 + (a-8)÷11 = 297 /·22
22a + 11(a-25) + 2(a-8) = 6534
22a + 11a - 275 + 2a - 16 = 6534
35a - 291 = 6534 /+291
35a = 6825
a = 6825 ÷ 35
a = 195
b = (a-25)÷2
b = (195-25)÷2
b = 170 ÷ 2
b = 85
c = (a-8)÷11
c = (195-8)÷11
c = 187 ÷ 11
c = 17
/robèrtinni