Symbols are very commonly used in equations. They are used to represent unknown numbers. |
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## Other Math Activities:Fun with EquationsMath Reference Library Home Page |
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2) (___x 4) x 2 = 24
In Algebra, x, y, z, a, b, c, l, k.., are common symbols used for unknowns and
are called variables. Above examples in Algebra can be written as: 2) (a x 4) x 2 = 24 3) 5 - h = 3
1) 3 + X =5 2) 14 = 19 - Y 3) 15 x Q = 45
Rosa has 12 marbles. Four of them are blue, and the rest are green. How many green marbles does Rosa have? First, create a math sentence for this problem: Four blue marbles + some green marbles = 12 marbles Let there be ' X ' number of green marbles; Therefore, the math sentence becomes: 4 blue marbles + ' X ' green marbles = 12 marbles 4 + X = 12 X = 12 - 4 X = 8 |
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