JeremiahO
JeremiahO JeremiahO
  • 21-07-2017
  • Mathematics
contestada

2x+3y=-5
3x-5y=21

The value of y that satisfies the system of the equations above is
A) 2
B)7
C) -3
D)There is no solution

Respuesta :

scarletblades101
scarletblades101 scarletblades101
  • 21-07-2017
You have to find a way to eliminate either x and y. We'll eliminate x:

2x + 3y = -5
3x - 5y = 21

2x*3 + 3y*3 = -5*3
3x*-2 + -5y*-2 = 21*-2

6x + 9y = -15
-6x + 10y = -42

19y = -57

y = -3
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