Step-by-step Answer
PAGE: 264SET: ExercisesPROBLEM: 22
Please look in your text book for this problem Statement

The equations are .

        Equation (1)

        Equation (2)

Solve the first equation .

According to addition property of equality: Add 3y to each side.

                 (Apply additive  identity property: )

                          (Apply additive inverse property: )

                               (Apply additive identity property: )

Substitute in equation (2).

                          (Multiply: )

                             (Add: )

According to division property of equality: Divide each side by 10.

                             (Cancel common terms)

                              (Divide: )

Substitute in equation .

                             (Multiply: )

The solution is .


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