One-step equations
“Solving an equation” means finding the value of a pronumeral.
e.g. To solve x + 3 = 7 means finding the answer that x = 4
Balance method
The most effective way to solve equations is the balance method.
We perform the same option to both sides of the equation.
x + 3 = 7
-3 -3
x = 4
To get the pronumeral by itself, we perform the inverse operation.
Examples
x - 5 = 2
+5 +5
x = 7
3y = 18 (note: 3y means 3 × y)
÷3 ÷3
y = 6
z ÷ 4 = 7
×4 ×4
z = 28