Writing Expressions
Write an expression for “a number plus 6.
x + 6
Evaluate 5x when x = 3.
15
Simplify 3x + 2x
5x
Expand 2(x + 3)
2x + 6
Solve x + 7 = 12
5
Write an expression for double a number decreased by 5.
2x - 5
Evaluate 2y + 7 when y = 4.
15
Simplify 4a + 5 – 2a + 3
2a + 8
Expand 4(y – 2)
4y – 8
Solve 3y = 21
7
Write an expression for “three times the sum of a number and 4.”
Evaluate 3a² – 4 when a = 5.
71
Simplify 6y – 3 + 2y + 7
8y + 4
Expand –3(x – 5)
–3x + 15
Solve 2x + 5 = 15
x = 5
Write an expression for “seven times a number, then add 9.”
Evaluate 6m – 2n when m = 4, n = 3.
18
7x + 4x – 9 + 3
11x – 6
Expand 5(2a + 7)
10a + 35
Solve 4a – 7 = 13
a = 5
Write an expression for “the square of a number, minus three times the number.”
x² – 3x
Evaluate 2p² + 3q when p = 6, q = 5.
87
Simplify 10y – 3y + 8 – 5 + 2y
9y + 3
Expand –6(3m – 4)
–18m + 24
Solve 3x – 8 = 13
7