ax + b = c
x + 16 = 43
x = 27
x/4 - 2 = 4
x = 24
2(x - 9) = 12
x = 15
2 (x + 2)
2x + 4
If Riley doubled the money currently in his bank, he would have $82. How much money does Riley currently have?
$41
7x - 45 = 18
x = 9
Show whether x = -4 is a solution to
x/2 - 6 = -8
Yes! -8 = -8
Show whether x = 5 is a solution to
5 (x - 1) = 18No! 20 =/= 18
5 (x + 8)
5x + 40
The formula E = -120 (T - 100) represents the amount of energy (E) that hikers need as a function of the outdoor temperature (T).
If the temperature is 10 degrees C, how much energy does a hiker need?
10,800 kJ
-14 + 9x = 31
x = 5
-x/7 + 39 = 31
x = 56
6 (-13 + x) = -36
x = 7
6 (x - 7)
6x - 42
The formula E = -120 (T - 100) represents the amount of energy (E) that hikers need as a function of the outdoor temperature (T).
If a hiker needs 13,800kJ of energy, what is the outdoor temperature?
-15 degrees C
82 - 4x = 54
84 - x/5 = 72
x = 60
7 (15 - x) = 84
x = 3
2 (3x + 3)
6x + 6
A garden has an area of 40m2. It's width is 5m. It's length is 2m longer than a shed placed along the length. Let s represent the length of the shed. How long is the shed?
6 m
20 - 3x = 38
x = -6
-31 - x/12 = -42
x = 132
3 (-8 - x) = 24
x = -16
Gisele has a square fence of side length s. This is the old fence. She then decreases the length of each side by 2m. This is the new fence. The perimeter of the new fence is 32m. What is the side length of the old fence (s)?
s = 10m