Need asap will give brainliest ! solve the system of equations x-2y=3 3x+y= -5 a) (-2,-1) b) (-1,-2) c) (7,2) d) (2,7)

B) (-1,-2)

Step-by-step explanation:

x-2y=3

3x+y=-5

The first step would be to rearrange an equation in order to be able to use the Substitution method.  Personally, I believe it is easiest to rearrange the first one:

x-2y=3

x=3+2y

Now that the equation has been rearranged, the Substitution method can be used:

3(3+2y)+y=-5

9+6y+y=-5

9+7y=-5

7y=-14

y=-2

Now that we have solved for y, we already kind of know the answer, since only one option has this y value, but it doesn't hurt to double check by plugging in "y" into an equation:

x=3+2(-2)

x=3-4

x=-1

The solution for the system of equation would be (-1,-2)

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column