Answer:

Step-by-step explanation:

Isolate y

Divide both sides of the equation by -3

Slope= y2-y1 / x2-x1
slope = 15 - (-1) / 3- (-1)
slope = 16 / 4
slope = 4
1/6 thats it u cant simplify
Your question is not clearly stated. Do you mean the difference between 10 * 10 * x, and 7 * 7 * 7 *x ? Then the number is x = 119/243. That's about 0.48971... in decimal form.
It's confusing when you say the "difference of a number". Differences are BETWEEN two numbers. See what I mean?