Question

Solve: 3x+9<4x+7

a. x>2
b. -x<-2
c. x<2
d. x>-2

@iGreen

Answer 1

You should really workout your basics before posting here. We are here to guide you and not give you answers. Note that.

Answer 2

\(3x + 9 < 4x + 7\)

Subtract 9 to both sides:

\(3x < 4x - 2\)

Subtract 4x to both sides:

\(-x < - 2\)

Divide all terms by -1..

-2 / -1 = ? @pigglet

Answer 3

2?

Answer 4

Yes.

That gives us:

\(x > 2\)

Remember to switch the sign when dividing by a negative number!

Answer 5

thank you for all your help!

Answer 6

No problem.