A = 2x 3 − 5x
2 − 10x − 4;B = x
3 + 2x
2 + 3x − 12; C = 5x
3 − 4x
2 + 2x + 10

A+B-C=

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

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here is the

mark brainliest pl

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