Solve the following set of equations. Can I use y = mx + b to calculate the equation

Question

4x−y = 6

2x + 3y = 5

Answer 1

re-arrange the first to say:
y = 4x-6
Now sub that into the 2nd:

2x + 3(4x-6) = 5

solve for x, then sub into y = 4x-6

or

write down the first:
4x - y = 6
double the second:
4x + 6y = 10

subtract them:
-7y = -4
y = 4/7

sub back into the first

you should of course get the same answers.

Answer 2

I solved for x and got x = 23/14

Is this right