Simplifying+and+Evaluating+Expressions+(Period+3)

__**Simplifying And Evaluating Expressions**__ Examples to help you...

2 //x// 3 + 7 2 × //y// + 5 2 + 6 × (4 - 2) //z// + 3 × (8 - //z// ) **Example 2:** Evaluate the expression 5x - 4(x -1), if 1) x = -1 2) x = 1 3) x = 2 Solution First simplify the expression. 5x - 4(x - 1) = 5x -4x + 4 = x + 4  When x = -1 the expression = x + 4 = (-1) + 4 = 3  When x = 1 the expression = x + 4 = (1) + 4 = 5  When x = 2 the expression = x + 4 = (2) + 4 = 6
 * Example 1:**

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