How do you solve and write the following in interval notation: 5x-4<9x5x−4<9x?

1 Answer
Jim G.
Apr 1, 2017

(-1,+oo)(−1,+∞)

Explanation:

Collect terms in x on one side and numeric values on the other.

subtract 5x from both sides.

cancel(5x)cancel(-5x)-4<9x-5x

rArr-4<4x

divide both sides by 4

(-4)/4<(cancel(4) x)/cancel(4)

rArr-1 < xrArrx> -1

rArrx in(-1,+oo)larrcolor(red)" in interval notation"

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