1. Algebraic Expressions
Level 4/5 Booster
Lesson 6B
Algebraic Expressions

2. evaluate equals symbol equation variable brackets simplify term
Objectives:
Understand that algebraic operations follow the same rules as arithmetic operations.
Solve simple equations
Transform information from words into algebraic expressions and equations.
Vocabulary:
evaluate
equals
symbol
equation
variable
brackets
simplify
term
expression

3. X + 7 = 22 T + 6 = 19 + R = 34 + W = 41 P - 14 = 27 G - 23 = 5 - H = 2
W/S 6.1B
X = 22
T = 19
+ R = 34
+ W = 41
P = 27
G = 5
- H = 2
L = 17
(X = 15)
(T = 13)
(R = 27)
Solve the equations.
(W = 22)
(P = 41)
(G = 28)
(H = 12)
(L = 7)

4. W/S 6.2B
Find the missing numbers:
1. A number x is multiplied by 6, and you get 54.
X = 9
2. Add 7 to a number y, double the answer and you get 20.
Y = 3
3. Think of a number T, multiply it by itself and the answer is 36
T = 6
4. Think of a number z, square it, add 12 and then you get 21.
Z = 3
5. Think of a number P, and then subtract 7. The answer is 25.
P = 32

5. Expression in words:
Expression in symbols:
Add seven to a number.
N + 7
Equation in symbols:
Equation in words:
N + 7 = 15
Add 7 to a number and you’ll get 15.
When we give an expression in symbols it is called an algebraic expression.

6. W/S 6.3B
Problems:
Make each of the expressions below into algebraic expressions.
1. A number X is multiplied by 3 and then added to 20.
(X x usually written 3x + 20)
2. Take 6 away from T.
( T – 6 )
3. Think of a number Y, double it, then subtract 7.
( Y x 2 – 7 usually written 2Y – 7 )
4. Think of a number Z, square it then add 5.
( Z² + 5 )
5. I think of a number ,G, add 2 and then multiply the answer by 3.
( G + 2 ) x 3 usually written 3 ( G + 2)

7. W/S 6.4B
Make each of the statements below into algebraic equations.
1. I think of a number, M, multiply it by 3, and add 7and the answer is 16.
3M + 7 = 16
M = 3
2. I think of a number, double it, take 7 away and the answer is 3.
2N – 7 = 3
N = 5
3. I think of a number, add 3 and then multiply by 4. The answer is 24.
4 ( N + 3 ) = 24
N = 3
4. I think of a number, square it, take away 3 and the answer is 13.
N² - 3 = 13
N = 4
In each of the questions above can you solve the equation.

8. evaluate equals symbol equation variable brackets simplify term
Objectives:
Understand that algebraic operations follow the same rules as arithmetic operations.
Solve simple equations
Transform information from words into algebraic expressions and equations.
Vocabulary:
evaluate
equals
symbol
equation
variable
brackets
simplify
term
expression

9. Thank you for your attention