Value of X
X represents what in an expression/equation/inequality
What is a Variable.
4n = 28
x + 4 > 10
x > 6
A number increased by 6 equals 20. Find the number.
14
What is the first thing you do on this equation to solve for x?
3 + x =12
Isolate the variable by preforming the inverse operation.
Solve:
x + 7 = 18
x = 11
n/6 = -5
n = -30
y − 8 ≤ 3
y ≤ 11
A number divided by 8 equals 3. Find the number.
24
What property are you using in the equation below to solve for x?
2(x − 4) = 12
Distributive Property
42 = x - 16
x = 58
-3n = -21
n = 7
-5a < 25
a > -5
5 less than a number is 12. Find the number.
17
Are equations and inequalities solved the same way?
Yes
x + 3.5 = 10
x = 6.5
n/-4 = 9
-36
b/3 ≥ -7
b ≥ -21
A number multiplied by -7 is 63. Find the number.
-9
The answers to an inequality are called what?
What is a solution set.
5 - x = -3
x = 8
0.5n = 8
n = 16
−2c > 8
c < −4
A temperature drops 15° to reach −5°. What was the starting temperature?
10°
When solving an inequality, if you divide or multiply by a negative number, what happens to the inequality sign?
You must flip it the other way.