The equation is .
write
Apply multiplication property of equality: If a = b then .
(Multiply each side by x)
(Cancel common terms)
Apply division property of equality: If a = b then .
(Divide each side by negative 15)
(Cancel common terms)
(The quotient of two same signs is positive)
(Divide: )
Check:
To check the solution, substitute in .
(Divide: )
The value of .
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