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# Year 7 Equations

### Definitions and Facts from the NSW Year 7 Equations Topic

TermDefinition
solve to find the unknown variables of an equation or inequality
inspection a method of solving equations or inequalities by looking at a question and mentally finding the answer using your knowledge of numbers
solution the answer to an equation or inequality
inequality a statement that two quantities are not equal , involving the signs > < ≥ or ≤
guess check improve a method of solving equations and inequalities by making a guess and improving on it.
equation a statement involving a variable (such as x), numbers and an equals (=) sign
balancing method a method of solving equations by using the same operations on both sides of the equation
backtracking method a method of solving equations by ‘undoing’, or performing inverse operations in reverse order
formula a rule written in algebraic form. It shows the relationship between variables.
substitution the replacement of numbers for variables to simplify or solve expressions and equations
variable a letter or symbol representing a varying quantity
inverse opposite, reverse operations
Created by: wdobson