
The linear function is
.
Rewrite the equation in standard form Ax + By = C.
\Apply multiplication property of equality: Multiply each side by 40.
\
Apply Associative property of multiplication:
.

(Multiply:
)
Distribute terms using distributive property: a(b + c) = ab + ac.
\
(Multiply:
)
\
Apply subtraction property of equality: Subtract 8y from each side.
\
(Apply Additive inverse Property:
)
Compare the equation with standard form to find the values A, B and C.
\
The equation in standard form is
.
.