One step equations
How do you "undo" division in an equation?
Multiply to booth sides
x + 2x= 12
x=4
How do you "undo" addition in an equation?
Subtract from both sides
How do you "undo" subtraction in an equation?
Add on both sides
x=10+5
x=15
How do you "undo" multiplication in an equation?
Divide both sides
5z+10=3z + 20
z=5
6y-20=-20+6y
Infinite solutions
1/3X=5
10y-5=25
y=3
3(x+5)= 45 +2x
x=30
4m-4=4m+82
No solution
y=mx+b for x
y/m - b/m = x
2x=10
x=5
4g-5+3g=16
g=3
4(x-3)= 2x+2
x=7
1/8x=4
x=32
A=1/2bh for b
2A/h=b