Adding/Subtracting Expressions
(x + 5) + (3x + 4)
4x + 9
Solve for x.
2x + 5 = 11
x = 3
2(x + 3) = 12
x = 3
Noah bought a movie ticket for $3.25 and some Airheads that cost $0.50 each. He spent $6.25 total. Which equation can be used to determine the number of Airheads Noah bought?
A. 3.25x + 0.50 = 6.25; x=1.77
B. 0.50x − 3.25 = 6.25; x=19
C. 0.50x = 6.25; x=12.50
D. 0.50x + 3.25 = 6.25; x=6
D. 0.50x + 3.25 = 6.25; x=6
(2x + 6) - (x + 2)
x + 4
1/2x - 4 = 6
x = 20
x = 5
A jacket costs x dollars. A winter jacket costs 25% more than the regular jacket. Which equivalent expressions represent the cost of the winter jacket?
Select all that apply.
A. 1.25x
B. x + 0.25x
C. (1 + 0.25)x
D. 1 + 0.25x
E. x + 1.25x
A, B, C
(5x - 9) + (4x + 7)
9x - 2
-3x - 9 = 18
x = -9
-4(x + 3) = -20
x = 2
Jordan bought a notebook for $2.40 and some pens that cost $0.80 each. He spent a total of $6.40, before tax. Which equation can be used to determine the number of pens Jordan bought?
A. 2.40x+0.80=6.40; x=2
B. 0.80x+2.40=6.40; x=5
C. 0.80x=6.40; x=8
D. 0.80x−2.40=6.40; x=11
B. 0.80x+2.40=6.40; x=5
(-8x + 4) - (2x - 3)
-10x + 7
3/4x - 3 = 15
x = 24
-3(x - 4) = 9
x = 1
A small plant is h inches tall. A taller plant is 60% taller than the small plant. Which equivalent expressions represent the height of the taller plant?
Select all that apply.
A. (1 + 0.6)x
B. x + 1.6
C. x + 0.6x
D. 1 + 0.6x
E. 1.6x
A, C, E
(4x - 8) + (2x - 4)
6x - 12
2/3x + 3 = -5
x = -12
-6(x - 2) = 12
x = 0
Liam bought a notebook for $1.75 and several bookmarks that cost $0.25 each. He spent $5.50 total. Which equation can be used to determine the number of bookmarks Liam bought?
A. 1.75x + 0.25 = 5.50; x=3
B. 0.25x = 5.50; x=22
C. 0.25x + 1.75 = 5.50; x=15
D. 0.25x − 5.50 = 1.75; x=29
C. 0.25x + 1.75 = 5.50; x=15