Solving by Combining Like Terms
Evaluate the expression
53 - 2x
where x = 14
25
Evaluate the expression
x2 - 4x + 3
where x = 5
8
Evaluate the expression
4x - 9y
where x = 4 and y = 5
-29
Evaluate the expression
32 - 4(x + 2y)
where x = 2 and y = 3
0
Evaluate the expression
142 - z(-8x + 2y)2 + y
where x = 2, y = 5, and z =3
39
When you count by ones from any integer, you are counting consecutive integers. Using variables, three consecutive integers are n, n + 1, and n + 2. The sum of three consecutive integers is 48. What are the integers?
n + n + 1 + n + 2 = 48 n = 15 The integers are 15, 16, and 17.