Question

Solve for x and y by deriving an expression for y from the second equation, and substituting it back into the first equation.

3x+3y=4
−4x−2y=−6

Are there any intuitions to these problems? Just looking to check my process, please provide explanation

Answer 1

x=1 y=-1/3

Answer 2

x=5/3 i was wrong

Answer 3

explanation

Answer 4

You can use linear algebra to solve them faster but simply isolating and pluging back in to get one value is all you can do if you dont know lin alg