Question

Which of the following equations has exactly one real solution?
A. 9(x + 10) = 9x + 90
B. 8x + 10 = 8x - 20
C. 9x + 10 = 9x + 10
D. 8x + 10 = -9x - 20

Answer 1

@armyengineer225

Answer 2

You'll have to go through and solve each one. But luckily these are pretty easy to solve in your head.

Answer 3

Simplify the left hand side of the equation for number one. Once you do, you'll notice that both sides are identical, which means x can be anything. We don't want that. We can now cross of A as one of our answers

Answer 4

@sloppycanada we can cross out c also right?

Answer 5

Yes.

Answer 6

and i dont think d has an answer does it? i kinda understand how to subtract from buth sides but i dont fully get it

Answer 7

both sides*

Answer 8

@sloppycanada @armyengineer225

Answer 9

The correct answer is D

Answer 10

oh ok thx

Answer 11

Yes, D is the right answer. If you subtract 8x from both sides in B, you get 0 = a number, which means no solution.

Answer 12

A can be crossed off because the equations equal on both sides and the possibilities for what x can be are endless

B is also false because the x's would just cancel out

C is also false for that same reason

Answer 13

ok thanks guys :D

Answer 14

@armyengineer225 @jaeuni

Answer 15

First write what the full equation would look like once you distribute the 2 in front of (8 + 4x)

Answer 16

um can u explain how to do that my brain is dead... ive been doing home work for over 10 hours now

Answer 17

When you distribute numbers directly next to some values that are in parenthesis, you multiply that outside number with all the values inside