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When figuring out what number goes both into 21 and 28, you should look at the factor paris. 21: 1 x 21, 3 x 7 28: 1, 28, 2 x 14, 4 x 7 7 goes into both 21 and 28.
49 is the square number of 7.
The algebraic equation for half a number plus 7 can be represented as (1/2)x + 7, where x represents the unknown number. In this equation, the term (1/2)x denotes half of the number, and adding 7 accounts for the additional value. This equation can be used to calculate the result when half of a number is added to 7.
x= the number of times 7 goes into 2767x = 276x = 39.4285714.....
7 subtracted from the quotient of a number and 2 is a -6