Me

what is the best first step for solving the given system using substitution while avoiding fractions?

3x+y=9
5x-3y=1

solve for x in the first equation.
solve for y in the first equation.
solve for x in the second equation.
solve for y in the second equation.

Option B is correct.

The best first step for solving the given system using substitution while avoiding fractions:

Solve for y in the first equation

Step-by-step explanation:

Given the system of equations:

        .....[1]

      .....[2]

We can write equation [1] as:

Using substitution substitute equation into [2] we have;

Therefore, the best first step for solving the given system using substitution while avoiding fractions is:

Solve for y in the first equation.

to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.