If anyone knows this then thank you

B. x = 12

Step-by-step explanation:

4x + 2 + x +22 = 84

5x + 24 = 84 ( addition property of equality)

5x = 60 (subtraction property of equality)

5x / 5 = 60 / 5 (division property of equality)

x = 12 (solved)

step-by-step explanation:

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