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Unit 26 Algebraic Expressions and Equations

Evaluate the following expressions for x = 2, y = 4, and z = 3.
1) 3x + 4

2) x2 + z2 3) 4y - x2 4) 3x + 2y - 4
5) 4xy - z

Solve these equations.
7) y - 4 = 3

8) y + 5 = 15 9) 3y = 24 10)
11) Mark's dad is four times as old as Mark. His dad is 28. Find Mark's age using an equation.

12) Write an expression for seven decreased by 2 times a number.
Quick Notes stars problems 11 and 12. Students have been told
that starred problems are very difficult. Students are encouraged
not to worry if they can't do these problems because there are
very few problems of this level on standardized exams covering
basic mathematics.

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