Answer: B. 26. x=26 and 26=x *The answer should be positive sign.*
Step-by-step explanation:
addition property of equality is adding the same number to both sides of an equation does not change the equation.
a+c=b+c
add by 9 both sides of an equation.
x-9+9=17+9
simplify by equation.
17+9=26
x=26 and 26=x
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