Question

PLEASE HELP

Examine the system of equations.
-3x + y = 4,
-9x + 5y = -1
What is the solution?

Answer 1

x= - 3.5

y= - 6.5-

Answer 2

x= - 3.5

y= - 6.5

Explanation:

-3x+y = 4 equation 1

-9x + 5y = -1 equation 2

and

equation 1 can be written as

y = 4+ 3x

so put this in equation 2

-9x + 5 ( 4+ 3x) = -1

-9x +20 +15x = -1

6x = -21

X= -21 ÷ 6

X = - 3.5

so put this value of x in equation 1 to find value of y

-3 ( -3.5) + y = 4

10.5 + y = 4

y = 4 - 10.5

Y = - 6.5