Question

esse sistema de equação da…
3x+55y=12
9x-55y=-8

Answer 1

$\left \{ {{3x \ + \ 55y \ = \ 12} \atop {9x \ - \ 55y \ = \ -8}} \right. \\ \\ 12x = 4 \\ x = \frac{4}{12} = \frac{1}{3} \\ \\ 3x \ + \ 55y \ = \ 12 \\ 3. \frac{1}{3} \ + 55y \ = \ 12 \\ 1 \ + \ 55y \ = \ 12 \\ 55y \ = \ 12 \ - \ 1 \\55y \ = \ 11\\y = \ \frac{11}{55} \ = \ \frac{1}{5} \\ \\ \\ x \ = \ \frac{1}{3} \ e \ y \ = \ \frac{1}{5}$