Question

PLEASE HELP ME

3x - 8y = 29

3x + y = -2
Question 4 options:


(0.5, -3.5)


(0, -2)


(0.75, -2.25)


(0, -3.75)

Answer 1

Solution to pair of linear equations

Explanation:

Subtract second equation from the first

`3x-8y=29\\3x+ y=-2\\`

subtraction eqn 2 from 1 we get

`(3x-3x)+(-8y-y) = (29-(-2))\\-9y=31\\y=-(31)/(9) \\y= - 3.44`

In order to find the value of x we will put this value of y in anyof the above equation and solve it for x

`3x-(31)/(9) = -2\\3x=-2+(31)/(9) \\3x=(-18+31)/(9) \\3x=(13)/(9) \\x=(13)/(9*3) \\x=(13)/(27) \\x=0.4814`

The Correct answer which is solution two the above linear pair of equations is

x=0.4814

y=-0.344