Both expressions involve multiplying the number 7 by another number. In both cases, the number 7 remains constant while the other number changes. The difference lies in the place value of the other number; in the first expression, 20 is 10 times greater than 2, while in the second expression, 2000 is 1000 times greater than 2.
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The answers will be 14 with how many zeros are present; 140 and 14,000 respectively.
lcm(7, 20, 35) = 140 7 = 7 20 = 2^2 x 5 35 = 5 x 7 lcm = 2^2 x 5 x 7 = 140
7 x 23 = (7 x 20) + (7 x 3)
7 x 420 = (7 x 400) + (7 x 20)
x - 7 = 13 Therefore, x = 13 + 7 x = 20
Suppose the answer is x.Then x + 1/2 = 7/20 so that x = 7/20 - 1/2 = 7/20 - 10/20 = -3/20