mayansoul2005 mayansoul2005
  • 19-10-2020
  • Mathematics
contestada

Solve for x and y please ASAP it is urgent, please give a logical explanation, will rate highly and award brainliest.

-7x+5y=-8
9x-8y=15

Solve for x and y please ASAP it is urgent please give a logical explanation will rate highly and award brainliest 7x5y8 9x8y15 class=

Respuesta :

tianabrice96
tianabrice96 tianabrice96
  • 20-10-2020
Answer is (-1,-3)
Step by step explanation:
Solving for x:
-7x+5y=-8
Multiply both side’s by 8
-56x+40y=-64

9x-8y=15
Multiply both sides by 5
45x-40y=75

Subtract
-56x+40y=-64
45x-40y=75
-11x=11
-11x/-11 = 11/-11
x=1

Substitute -1 for x to get y
-7(-1)+5y=-8
Multiply 7 and -1
7+5y=-8
Then subtract 7 from both sides
5y=-15
Then divide both sides by 5
Y=-3

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