Hey guys can somebody me ? with all the questions

Sorry this is not the answer but I think it will help majorly it you can replace the unknown numbers with random ones and just keep on switching it out. Hope it helps a bit.  :)

The answer to the riddle is I_SO_LATE_ME! (the underscores are the squares.

1. 3x+2=5 (o)

2. 4+9+5+x=2x (square)

3. x/4+7=12 (a)

4. 2x+3=12 (e)

5. 7x=42 (!)

6. x/5=3 (e)

7. 2x+3x+4=12 (s)

8. 3x-2=5 (square)

9.

10.

11.

12.

13.

c. side angle side. u shares the same sides

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116