Which expressions could complete this equation so that it has an infinite number of solutions?
9x-3(x+8)=
choose exactly two answers

David opens a bank account with $140 and then deposits $150 each month. Louis opens a bank account with $260 and deposits $120 each month.

How many months will it take for David and Louis to have equal amounts of money in their accounts?

A.2

B.4

C.5

D.7

Question

Which expressions could complete this equation so that it has an infinite number of solutions? 
9x-3(x+8)= 
choose exactly two answers 

David opens a bank account with $140 and then deposits $150 each month. Louis opens a bank account with $260 and deposits $120 each month. 

How many months will it take for David and Louis to have equal amounts of money in their accounts? 

A.2 

B.4 

C.5 

D.7

anonymous · Answer

mostly need help on the first one >.<

aum · Answer

9x-3(x+8)= ?

The left hand side simplifies to 9x - 3x - 24 = 6x - 24
If you make the right hand side 6x - 24, then it is no longer an equation that works only for one x value.  Instead it becomes an identity which is true for ANY value of x because the left and the right side are one and the same expression, just simplified a bit on the right.

So if RHS is 6x - 24, the equation will have infinite number of solutions because any x value will satisfy the equation.

anonymous · Answer

Thank you!! i got 100% :3

aum · Answer

Yay!  You are welcome.