Solve for the missing side x
How do I answer this?

x=5

Step-by-step explanation:

Plugin the number into sthe pythagroyean theorm (a²+b²=c²), with 3 replacing a, 4 replacing b, and x replacing c.

3²+4² = x²

9+16 = x²

25 = x²

√25 = √x²

x = 5

It's helpful to remember that if the opposite and adjacent sides of the triangle (in this case CB and AB) are the lengths 3 and 4, the hypotenuse (longest side of the triangle) is always equal to 5.

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