Răspuns:
A (8/3 ; 35/3)
Explicație pas cu pas:
f,g : R b----> R
f(x) = x+9
g(x) = 7x-7
f(x) ∩ g(x) <=> f(x) = g(x) <=>
x +9 = 7x -7 <=>
7x -x = 9+7 => 6x = 16 => x = 16/6 => x = 8/3
y = 8/3 + ³⁾9 = (8+27) /3 => y = 35/3
