PRE-ALGEBRA, 2012
48

 PAGE: 241 SET: Exercises PROBLEM: 48
Please look in your text book for this problem Statement

The expression is .

Apply subtraction property of equality: Subtract 3t from each side.

(Apply commutative property of addition: )

(Apply additive inverse property: )

(Apply additive identity property: )

(Subtract: )

(Subtract 30 from each side)

(Apply additive inverse property: )

(Apply additive identity property: )

(Subtract: )

(Divide each side by 3)

(Cancel common terms)

(Divide: )

Check:

To check the solution, substitute in original equation.

(Product of two different signs is negative)

(Multiply: )

(Subtract: )

The statement is true.

The solution is .

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