1. The problem is to find the solution $(x,y)$ to the system of equations:
$$y = 12x - 20$$
$$y = 28$$
2. Since $y=28$, substitute $y$ in the first equation:
$$28 = 12x - 20$$
3. Add 20 to both sides:
$$28 + 20 = 12x - 20 + 20$$
$$48 = 12x$$
4. Divide both sides by 12:
$$\frac{48}{\cancel{12}} = \frac{12x}{\cancel{12}}$$
$$4 = x$$
5. So the solution is:
$$(x,y) = (4, 28)$$
6. Checking the options, the correct answer is A. (4, 28).
Solve System 1490D0
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