What is the first step to solve the following system of equations using substitution? X-y=-1
2x-y=3
A.) Solve the first equation for x.
B.) Divide the second equation by 2.
C.) Multiply the first equation by 2.
D.) Add the two equations together.

Step 1: Solve one of the equations for one of the variables. Let's solve the first equation for x

Thus, option A) is true.

The solution to the system of equations be:

Step-by-step explanation:

It is important to remember that when we solve the system of equations, the first step we need to do is to solve one of the equations for one of the variables.

Given the system of equations

Step 1: Solve one of the equations for one of the variables. Let's solve the first equation for x

Add y to both sides

Thus, option A) is true.

NOW LET US SOLVE THE REMAINING PORTION

to solve for y

For x = -1 + y

substitute y = 5

Thus, the solution to the system of equations be:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

im pretty sure its

(8,15)

step-by-step explanation: