babym12
babym12 babym12
  • 11-12-2018
  • Mathematics
contestada

What is the value of y in the solution to the following system kid equations 5x-3y=-11 2x-6y=-14

Respuesta :

jimrgrant1 jimrgrant1
  • 11-12-2018

Answer:

y = 2

Step-by-step explanation:

given the 2 equations

5x - 3y = - 11 → (1)

2x - 6y = - 14 → (2)

multiply (1) by - 2, to eliminate the term in y

- 10x + 6y = 22 → (3)

add (2) and (3) term by term

(2x - 10x) + (- 6y + 6y) = (- 14 + 22)

- 8x = 8 ( divide both sides by - 8 )

x = - 1

substitute x = - 1 into either (1) or (2) and solve for y

(1) : - 5 - 3y = - 11 ( add 5 to both sides )

- 3y = - 6 ( divide both sides by - 3 )

y = 2

solution is (- 1, 2 )


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