ElectricPavlov

Since it is a 'salary' and not a 'wage', I expect you get paid the same amount each month.

365 days/year   divided by 12 yeilds an 'average month of  30.41 days

(30.41 days/month)  / (  11 days/ $800 ) =  $2212.12 per month

This is approximate as we are dealing with averages and an unknown 11 day period

Uhhhhh..... ''x"  can be anything until you include an '=' sign and value....

"3*9=27+4=31 that over 1 gets"

Huh?   Where did you get    ' over 1 '     your question has it   'over SEVEN'    ....read your question!!!!!   AND the '4' is not included in the fraction the way you have it written.....

Multiply through to get

3x +4x -8 = 13    add 8 to both sides of the eq   and combine the 'x' terms

7x = 21               divide both sides by  7

x =3

This one equals:

3*(2)  + 12/3 *3^2         |5-7|  =  |-2| = 2

6       +    4 *  9

6 + 36

42

This equals:

4 +3(9)/7 -6

4 + 27/7 -6

-2 + 27/7

-2 + 3 6/7

1 6/7

Do it this way   ( -12) ^2 =144   (use the parentheses ...with the neg sign INSIDE )

You can set it up as a ratio:

.41/x = 1/64

.41 (64) = x = 26.24 "