Practice and Revision - Equations
Let us practise and revise what we learned about equations. An equation states that two expressions are equal, and solving equations involve
Core concept
An equation has an equal sign (=), showing that the expressions on both sides have the same value, like x+5=10.
How it works
To solve an equation, we perform the same operation on both sides to isolate the variable, like subtracting 5 from both sides.
Why it matters
Checking a solution involves substituting the found value back into the original equation to verify both sides are equal.
Key detail
Solving equations is a fundamental algebra skill used to solve real-life problems involving unknown quantities.
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Quick notes
• Equation: two expressions equal, has '='.
• Example: x+5=10.
• Solve by doing same operation both sides.
• This isolates the variable.
• Check solution by substituting back.
• Verify both sides are equal.
• Equations are fundamental to algebra.
• They solve real-life unknown-quantity problems.