Add and Subtract Expressions
What is 3x+5x?
8x
Expand 3(a+4).
3a+12
Solve x+7=12
x=5
Solve 2x+3=11
x=4
A family rented a car for vacation. It rental cost is $13 per day, plus a $40 insurance fee. They spent a total of $105. Write an equation and solve for how many days they rented the car.
13d+40=105 ; d = 5 days
Simplify 2a+3b−a+b.
a + 4b
Factor 10x+5.
5(2x+1)
Solve 5y=25.
y=5
Solve 3y−5=10
y=5
Samantha and her friend went to the movies. They bought two tickets and a bucket of popcorn that cost $5. Their total cost was $23. How much did each ticket cost?
2x+5=23 ; x=$9
Combine the like terms in 7y−2+3y+4.
10y + 2
Expand -2(x−3)+4
-2x+10
Solve -3+z=10
z=13
Solve -8+4z=24
z=8
The temperature in the morning was x degrees. By noon, it had increased by 12 degrees. By evening, it dropped 5 degrees, making the final temperature 20 degrees. What was the morning temperature?
x+12-5=20 ; 13 degrees
If x=4, what is the value of 2x+3?
11
Expand and simplify 5(2x+1)−3(x+4)
7x-7
Solve -3k=12.
k=-4
Solve b/6 - 4 = 20
b = 144
Jenny and her two friends each bought 2 slices of pizza and a soda. Each soda cost 2.50, and their total bill was $48. How much did each slice of pizza cost?
3(2p+2.5)=48 ; $6.75
What is the result of 5(x+2)−3(x−1)?
2x+13
Factor the expression 12xy+8x
4x(3y+2)
Solve -x/4=16
x=-64
Solve 3/a - 2 = 7
a= 1/3 or 0.333
I am thinking of three consecutive integers whose sum is 81. What is the largest of the three integers?
x+x+1+x+2=81 ; x=26 ; the largest integer is 28