One-Step Equations
x + 7 = 12
5
x + 3.2 = 7.8
4.6
2x + 5 = 13
4
(x − 5)/7 = 3
3.8
How do you know if you're looking at an equation in math class? What symbol do you need to see?
an equal sign
y − 4 = 9
13
y / 2.5 = 3.6
9
x/3 − 4 = 2 →
18
x/3.2 − 1.4 = 2.6
12.8
What word describes a letter in math that stands for an unknown number?
variable
3z = 21
7
z − 4.7 = −1.3
3.4
x/5 + 7 = 12
25
x/2.5 + 6.1 = 11.6
13.75
Addition, Subtraction, Multiplication, Division, Exponents
w / 6 = 8
-42
−2.5w = 7.5
-3
(x + 3)/4 = 6
21
(x + 3.24)/4.5 = −2.16
-12.96
What word describes an operation reverses or cancels another operation?
inverse
n - (−3) = 10
7
n / (−4.36) = 8.72
38.02
(x − 5)/7 = 3
26
(x − 6.18)/-3.5 = 4.22
-8.59
What is the difference between evaluating and solving?
Evaluating we use order of operations forwards. Solving uses inverse operations, going backwards.