One-step equations

One-step equations
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  • Algebra:Good Morning Children
  • Math
  • One step equations
  • Today, we will be solving one-step equations
  • Algebra
  • Math
  • Let's get started
  • Math
  • Algebra
  • x+5=120
  • Equation
  • This is a variable. A variable is an unknown number and we will try to find out what this unknown is.
  • Inverse operations:Opposite operations that undo each other.ex. add and subtractmultiply and divide
  • Math
  • Algebra
  • x+5=120
  • To do this, we first have to isolate the variable (get it by itself), with inverse operations.
  • Inverse operations:Opposite operations that undo each other.ex. add and subtractmultiply and divide
  • Math
  • BalanceDo the same to both sides of the equation
  • x+5=120-5   -5-----------x=115
  • The inverse of adding is subtracting, so subtract 5 from both sides of the equation.
  • Multiply/Divide ex.2x=802    2x=40
  • Math
  • Algebra
  • x+5=120-5   -5-----------x=115
  • To check:Substitute value of variable into equation.Does it make sense?
  • And we found the unknown!!!
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