An equation is an equality with a letter (an unknown number) that you want to turn into a true numerical equality. A number that makes the equality true is called a root (or solution) of the equation.
How to solve a problem with an equation:
1) name the unknown with a letter (x, y, …);
2) from the story, write an equation (turn phrases into addends, subtrahends, products, and so on);
3) solve the equation (using arithmetic rules);
4) check the answer in the wording of the problem (units, whether it is reasonable, “became” vs “remains”);
5) write the answer and say what the found number means.
Unknown — a letter; equation — an equality with that letter
Root — a number that makes the equality true
From the story to an equation, from the equation to the answer
A sense check in the story is required
Unknown addend: x+a=b
Content is available with subscription.
Get full access to all courses on the platform for one year with a single payment.
▼
Unlike other platforms that charge per course, here you get everything for one price, and after one year of use there will be no automatic charge for the following year.