Answer: 2x-6
Work Shown:
john = x
sam = x-3 since he scored 3 fewer than john
rob = 2*(sam) = 2(x-3) = 2*x-2*3 = 2x-6
Answer:
Step-by-step explanation:
<u>Step 1: Set y to 15 and solve</u>
<u />

<em>Add 10 to both sides</em>
<em />

<em>Multiply both sides by 5</em>
<em />

Answer: 
Ok this is a hard problem of math you need to count the numbers form one through 100 and through 10 or 20 but keep it in oder
3x+12=5x-21
-5x -5x
-2x + 12 = -21
-12 -12
-2x=-33
x = 16.5
Maybe from the equation of a line from y=mx+c
Where c ( intercept) is -12