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  • Usuário do Brainly
2014-06-08T15:52:32-03:00
 \left \{ {{3x+5y=7} \atop {2x-3y=11}} \right.

x= \frac{7-5y}{3}

2( \frac{7-5y}{3} ) -3y =11

 \frac{14-10y}{3}  -3y =11

MMC=3

14 -10y -9y = 33
-19y=19
y=- 1

x=  \frac{7-5(-1) }{3}
x=  \frac{7+5}{3}
x= \frac{12}{3}
x=4
                                                   S={(4;-1)}

3 4 3