1. Words Into Symbols
Objective: To translate word phrases into algebraic expressions and word sentences into equations
by Gavin McGerald

2. Expressions examples A number decreased by 3 A number increased by 7
4 more than the square of a number
The difference of twice a number and 5
Twice the sum of a number and 5
X – 3
n + 7
b2 + 4
2n – 5
2(x + 5)
by Gavin McGerald

3. In a word problem
A train leaves town A going east at 70m mph toward town B, another train from town A left an hour later at 60 mph going west. What is the distance between the two trains after x hours?
D = rt
60(x-1) 70x
60(x-1) + 70x = 60x – x = 130x - 60
TownA
by Gavin McGerald

4. Consecutive Numbers
The sum of 4 consecutive odd integers is 64 find each integer
First number is x, next number must be x + 2 the third x + 4 and so on.
x + (x + 2) + (x + 4) + (x + 6) = 64
4x + 12 = 64
4x = 52
x = 13
13, 15, 17, 19
by Gavin McGerald