Izab15
Izab15
02-11-2017
Mathematics
contestada
Elimination
4x+5y=-15
-3x-2y=13
Respuesta :
Dreamer4102001
Dreamer4102001
04-11-2017
multiply the first equation by 3 and tge second by 4:
12x+15y=-45
-12x-8y=52
then add the equations:
0x+7y=7
7y=7
y=1
so 4x+5(1)=-15
4x+5=-15
4x=-20
x=-5
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