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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

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2

1

x = 1

step-by-step explanation:

0 ÷ x = 0

0 ÷ 1 = 0