Pablo ran farther, the work I did is below. I used an LCD (Lowest common denominator) to solve the problem.
Answer:
On problem one the answer is 4 but I'm not sure about the second problem
answer: -3
remember the equation y = mx + b
m is the slope, and b is the y-intercept
so in the equation y = 4x - 3,
4 replaces the m as the slope and -3 replaces b for the y-intercept
so -3 is your answer