Which expression is equivalent to 2x - 17?
a) -17 + 2x
b) -2x + 17
c) -2x - 17
d) 17 + 2x

2x - 17?

= -17 +2x (using commutative property of addition, changing order and sum remains the same)

answer is A) -17 + 2x

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