Directions: solve each of the following equations.

a. combine like terms

b. then isolate the variable if necessary

c. follow rules for signed numbers

11. 76x + 23x = 33

12. 140r - 8r - 4r = 216

13. 98c - 99c = 1

14. 104mn + (-84mn) = 36

15. 118j - 234j = 234

(i appreciate all your ) u

Step-by-step explanation:

11. 76x + 23x = 33

    99x = 33

   x = 33/99 which reduces to 3

12. 140r - 8r - 4r = 216

    128r = 216

   r = 216/128 which reduces to 27/16

13. 98c - 99c = 1

-1c = 1

c = -1/1

c = -1

14. 104mn + (-84mn) = 36

    104mn - 84mn = 36

   20mn = 36

   mn = 36/20 which reduces to 9/5I am not sure about this one...I was not                sure if u were looking for m or n..so I didn't separate them. But if ur looking for m, it is m = 9/5n...and if ur looking for n, it is n = 9/5m

15. 118j - 234j = 234

   - 116j = 234

    j = -234/116 reduces to - 117/58

step-by-step explanation:

5×5×5+2(8)÷2(2)+3(3)

15+16÷4+9

31÷13

do 31÷13 and u will get ur answer