The equation is .

Apply addition property of equality: If a = b then a + b = b + a.

             (Add y to each side) \ \

                        (Apply additive inverse property: ) \ \

Apply subtraction property of equality: If a = b then a b = b a.

   (Subtract 10x from each side) \ \

Apply commutative property of addition: a + b = b + a.

                        (Apply additive inverse property: )

Combine like terms using distributive property: .

\ \

                                      (Subtract: ) \ \

y = 2x                                       (Simplify)

The solution of y = 2x.