SOLUTION: For the equations a^x /a^y=a^-10 and (a^y)^3=a^-x, if a>1,what is the value of x?
2.5
-7.5
2
1
Algebra.Com
Question 1119245: For the equations a^x /a^y=a^-10 and (a^y)^3=a^-x, if a>1,what is the value of x?
2.5
-7.5
2
1
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
x-y=-10 from the first equation
y=x+10
(a^x+10)^3=a^(-x)
a^3x+30=a^(-x)
-x=3x+30
-4x=30
x=-7.5
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