Question

calcule o valor de x e y no sistema {x+y=4} {2×-3y=3}

Answer 1

{x+y=4
{2x-3y=3
x=4-y
2(4-y)-3y=3
8-2y-3y=3
-2y-3y=3-8
-5y=-5.(-1)
5y=5
y=5/5
y=1
x=4-y
x=4-1
x=3
S={(3, 1)}