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## Homework Statement

Solve each of the following equations. This is part of a practice mock test I have for an exam so I have all the answers but they aren't lining up somewhere. I got a) right but b) and c) wrong

## Homework Equations

a)4x+6=18

b)5x+7=7x-9

c)1/x+2 = 7 (giving answer rounded to 4 decimal places)

## The Attempt at a Solution

The first was easy, the rest though :/

a:

4x+6=18

4x=12

x=3

b:

5x+7 = 7x-9

-2X = -2

X= 4

c:

1/x+2 = 7

x+2 = (7*1)

x=5

the answer they got was -1.8571...

Please help guys this basic stuff is killing me! I can do that advanced stuff no problem (this is for a degree in Engineering) but this basic stuff is a nightmare!!