Answer
There are infinite number of solutions to the system.
Work Step by Step
Equation 1: $8x - 4y = 12$
Equation 2: $y = 2x - 3$
Substitute equation 2 to equation 1:
$$8x - 4y = 12$$ $$8x - 4(2x - 3) = 12$$ $$8x - 8x + 12 = 12$$ $$0+12=12$$ $$12=12$$
Since both sides are equal, therefore there are infinite number of solutions to the system.