Solve the following equations.
20. x/4 + 10 = 3/4
21. 12 = |x + 8|
22. -3|x - 4| + 2 = -7
23. 16(x – 2) – (x – 3) = 29
24.5/6(2x – 8) = 45
25. f = 9/5c + 32 solve for c.

20

Start with

Multiply both sides by 4:

Subtract 40 from both sides:

21

If the absolute value of something equals 12, then that something is either 12 or -12: the possibilities are

or

22

You can isolate the absolute value

And proceed as before.

23

Distribute the 16:

24

Multiply both sides by 6/5:

25

Start with

Subtract 32 from both sides

Multiply both sides by 5/9

the nearest power is 1.651.

means 7482 to the 1.651th power is almost equal to 2489287