Resposta :
Vamos lá
Sendo x=-3 e y=7
[tex]\boxed{\begin{array}{lr} \large \sf 8x+5y \\ \\ \large \sf 8\times(-3)+5\times7 \\ \\ \large \sf -24+35 \\ \\ \large \sf 11 \end{array}}[/tex]
Logo será:
[tex]\boxed{\boxed{\sf 11}}\Longleftarrow[/tex]
Bons estudos =)
