Question

Which is the best first step when solving the following system of equations?

x + y = 3. 4 x minus y = 7.
Multiply the first equation by 4.
Add the first equation to the second equation.
Multiply the second equation by Negative 1.
Subtract the second equation from the first equation.

Answer 1

Below

Explanation:

Add the two equations....this will eliminate 'y' and you can solve for 'x'

then use this value of 'x' to calculate the corresponding value of 'y'