The equation is .
Combine like terms using distributive property: ab ac = a( b
c).
Apply subtraction property of equality: Subtract 4x from each side.
\Rearrange the terms using commutative property of addition: .
(Multiply:
)
(Subtract:
)
Apply division property of equality: Divide each side by (7+5x).
\ (Cancel common terms)
(Substitute
)
(Multiply:
)
(Add:
)
(Divide:
)
The solution is .