Divide 90/10 pleasei need the answer

ok so how many times does 10 go into 90

1.10

2.20

3.30

4.40

5.50

6.60

7.70

8.80

9.90

9 times so

9

Hope This Helps!!!

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