Chapter 2, Lesson 9


2-9.A substitute into algebraic expressions and evaluate
Evaluate each expression for a = —4 and b = 3.
a.
—2(a + b) b. 12ab

2-9.B solve one-step equations
Solve each equation.
a.
3x + 4 — 2x = 11

b. 9 = 7y — 8 — 6y

c.

d. —16q = 64

2-9.C solve two-step equations
Solve each equation.
a.
2x + 3 = 15
b.