15 * 2, the product of 15 and 2, is 30
And the product of 15 and 25, is 375
And the product of 15 and 178, is 2770
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To find the third number, divide the product of the three numbers by the product of the two known numbers. First, calculate the product of the known numbers: 13 × 15 = 195. Then, divide 2730 by 195: 2730 ÷ 195 = 14. Therefore, the third number is 14.
Let the unknown number be x: 9x-15 = 39 9x = 39+15 9x = 54 Divide both sides by 9 to find the value of x: x = 6
product
Product means multiply in maths. 12*15=180
If the number is n, and the product is of the numbers p and q, the expression is p*q + (n + 15) : the parentheses are not necessary.