Answer: B. -5 x=-5 *The answer should be the negative sign.*
Explanation:
addition property of equality is adding the same number to both sides of an equation does not change the equation.
add by 10 both sides of an equation.
x-10+10=-15+10
simplify by equation.
-15+10=-5
15-10=5
10+5=15
15-5=10
It changes to positive to negative.
x=-5
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