Equations

Equations - mathematical statement with 2 expressions that have the same value
eg : x+2=3 , y-7 = (-4) , 3a-2 = 9+2 , b=4

Model 8 times a number plus 4 is 12
8n+4 = 12

Identify : 5y-6 = 19
variable = y
numerical coefficient = 5
constant = 6




Opposite Operations
+, -
x , ÷
- , +
÷ , x

a+1 = 3
a+1-1 = 3-1
a = 2

Sub
a+1 = 3
2+1 = 3
3=3



Reverse order of operation

4c-3 = 17
4c-3+3=17+3
4c÷4 = 20÷4
c = 5

Sub
4c-3=17

4(5)-3=17
20-3=17
17=17

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Equation

Equation- mathematical statement with two expression that have the same value

Eg.

Model: 8 times a number plus 4 is 12 8n+4=12

5y-6=19

numerical coefficient =5

variable =5

constant =6

C+(-3)=(-6) Brackets in this equation is use to reduce confusion.

Opposite Operations

A+1=3

A+1-1=3-1

A=2

Sub A+1=3

2+1=3

3=3

reverse order of operation

4c-4=17

4c-3+3=17+3

4c=20

4c÷4=20÷4

c=5

sub 4c-3=17

4(5)-3=17

20-3=17

17=17

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