Overview
Important
An equation is a statement that two algebraic expressions are equal. Solving an equation means finding all values of the variable(s) that make the equation true.
Important properties
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Equations can have one or more variables.
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You can perform the same operation on both sides of an equation without changing its solutions.
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Some equations have one solution, more than one solution, or no solution.
Practice
The head of a fish weighs as much as the tail and half of the body, the body wei
Two cyclists left at the same time from the same point in the same direction. Th
Michael bought a batch of pens at the wholesale market and offers customers eith
One sapphire and two topaz are three times more valuable than an emerald. And se
Think of 45 as the sum of four numbers so that after adding 2 to the first numbe
A tourist walking from a village to a railway station, having walked 3 kilometer
Four friends are buying a boat. The first one contributes half the amount contri
From a hot tap, the bathtub fills in 23 minutes, from a cold tap - in 17 minutes
The student had to divide the number by 2 and add 3 to the result, but he, by mi
The tourist went 20 km up the river in a boat and came back down, spending 10 ho
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