Equation Solution Examples

One Step Equations
  x+3=7
x+3-3=7-3
    x=4

ADD (subtract from both sides) 
  19=a+2
19-2=a+2-2
  17=a
ADD (subtract from both sides)		 
  x-4=6
x-4+4=6+4
    x=10
SUBTRACT (add to both sides)		 
  7=x-3
7+3=x-3+3
 10=x
SUBTRACT (add to both sides)
 3x=12
3x=12
 3  3
 x=4
MULTIPLY (divide both sides)		 
 16=4x
16=4x
  4  4
  4=x
MULTIPLY (divide both sides)		 
x=12
 4 
x(4)=12(4)
 4
 x=48
DIVIDE (multiply both sides)		 
   12=a
    7
12(7)=a(7)
      7
   84=a
DIVIDE (multiply both sides)
Two Step Equations
  3x+4=19
3x+4-4=19-4
    3x=15
    3x=15
     3  3
     x=5
Subtract 4 first, then divide by 3		 
   n+4=7
   2
n+4-4=7-4
 2
     n=3
     2
  n(2)=3(2)
  2
     n=6
Subtract 4 first, then multiply by 2		 
  15=3a-3
15+3=3a-3+3
  18=3a
  18=3a
   3  3
   6=a
Add 3 first, then divide by 3		 
   2=m-2
     4  
 2+2=m-2+2
     4    
   4=m
     4   
4(4)=m(4)
     4   
  16=m
add 2, then multiply by 4