Resolver las ecuaciones usando cualquier metodo de solucion
a) x+2y=-15
6x-5y=17
b) x/2+y/3=9
x+y=21
c) 2x/3+3y/4=1
y/8-5x/6=2
d) x/3-y/2=1/24
3x-5y=11/4
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