Answer:
Let x = the number of marbles Tim has
Let 2x = the number of marbles Sue has
x + 2x + 15 = 63
3x = 48
x = 16 marbles
Step-by-step explanation:
Answer:
x = 5.5
Step-by-step explanation:
Solve for x by simplifying both sides of the equation, then isolating the variable.



-7 -7

Divide both sides by -1.

Answer:
x=3
Step-by-step explanation:
Answer: 4 terms
Step-by-step explanation:
-4a , 8c, -4b, and 3
Answer: (-2,2), (-8,-1)
Step-by-step explanation: