The equation is .
According to subtraction property of equality: If , then
.
(Subtract 4x from each side)
(Commutative property:
)
(Addtive inverse property:
)
(Addtive identity property:
)
(Subtract:
)
(Subtract 25 from each side)
(Addtive inverse property:
)
(Addtive identity property:
)
(Subtract:
)
(Divide each side by 6)
(Cancel common terms)
(Divide:
)
Verify:
\To check the solution, substitute in original equation.
(Multiply:
)
(Add:
)
Compare the values, the equation is true.
\
The solution is .