One-Step equations
a + 3 = 8
5
3x - 5 = 16
x = 7
Give me an example of a variable
any letter
5a = 25
5
12s - 4s + 2 = 10
s = 1
a - 10 = 13
a = 23
20 = 6y - 4
y = 4
Give an example of a constant
Any Number
25n = 625
25
-20c - 2c - 6 = 16
a + 66= 21
-45
12z + 4 = 28
z = 2
What is the inverse operation of addition?
Subtraction
18g = 486
27
(q + 12) / (-2) = 3
a - 15 = 15
a = 30
(h/9) + 11 = 20
h = 1
What is the inverse operation of multiplication?
Division /
12y = -144
-12
4 = 4 (g + 11)
g = -10
a + (-12) = 86
86
(2q/3) -5 = 5
Give an example of a variable with a coefficient.
-8x = 56
-7
Ms. Curtis is making a photo album for the 9th grade class at ECHHS. There are 7 pages in the photo album. Ms. Curtis puts the same number of photos on each page, for a total of 42 photos.
What equation would you use to find the number of photos (p) on each page?
BONUS: how many photos are on each page?
7p = 42
6 photos