The equation is .
(Product of two same sign is positive).
According to Multiplication property of equality: if , then
.
(Multiply each side by negative 8)
(Cancel common terms)
(Multiply:
)
According to addition property of equality: if a = b, then a + c = b + c.
\ (Add 6p to each side)
(Commutative property: a + b = b + a)
(Additive inverse property:
)
(Add 72 to each side)
(Commutative property: a + b = b + a)
(Additive inverse property:
)
(Add:
)
According to division property of equality: if , then
.
(Divide each side by 6)
(Cancel common terms)
(Divide:
)
Check:
\To check the solution, substitute in original equation.
(Multiply:
)
(Product of two same signs is positive)
(Multiply:
)
(Add:
)
(Divide:
)
Compare the values, the equation is true. The solution is
The value of .