Question

quanto é ?{y=5-x
{y=9-2x

Answer 1

y=5-x
y=9-2x
--------------------
0=4+3x
3x=-4
x=-4/3

y=5-4/3  = (3x5-4) /3 = (15-4)/3  = 
y= 11/3

y= 3,666666