7x-3y=4 and -14x+6y=-8
This equations are linear combinations. Both equations have variables x and y with coefficients A and B.
Furthermore, the first equation is in standard format...
Ax+By=C, neither A nor B equal zero and A is greater than zero.
However, the second equation is NOT in standard format in that A is less than zero...
Let's fix that by multiplying both sides by -1...
7x-3y=4 and 14x-6y=8
Let's take the first equation...
Let's multiply both sides by 2...
It is identical to the second equation.
ZERO SOLUTIONS ARE POSSIBLE BECAUSE BOTH EQUATIONS ARE IDENTICAL.