\"\"\"\"\"\"

\

The equations are \"\".

\

\"\"        Equation (1)

\

\"\"     Equation (2)

\

Solve the first equation \"\"

\

\"\"

\

According to addition property of equality: Add 0.3x to each side.

\

\"\"

\

\"\"   (Apply commutative property of addition: \"\")  

\

\"\"                      (Apply additive inverse property: \"\")      

\

\"\"                           (Apply additive identity property: \"\")       \"\"

\

Substitute \"\" in equation (2).

\

\"\"

\

\"\"  (Apply distributive property: \"\")

\

\"\"         (Multiply\"\")

\

\"\"         (Apply commutative property of addition: \"\")

\

\"\"                    (Subtract: \"\") 

\

\"\"

\

\"\"   (Add 0.15 to each side)

\

\"\"              (Apply additive inverse property: \"\")

\

\"\"                   (Apply additive identity property: \"\")           

\

\"\"                            (Add: \"\")

\

\"\"

\

According to division property of equality: Divide each side by 0.41.

\

\"\"

\

\"\"                                 (Cancel common terms)

\

\"\"                                        (Divide: \"\")\"\"

\

Substitute \"\" in equation \"\".

\

\"\"

\

\"\"                                       (Multiply: \"\")

\

\"\"                                         (Add: \"\")

\

\"\"

\

The solution is \"\".