The sum of first 20 multiples of 7 will be 1470.
Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem.
Given are first 20 multiples of 7.
The sequence of first 20 multiples of 7 will be -
7, 14, 21, 28, ..... , 140
Sum = (20/2)[2 x 7 + (19) x 7]
Sum = 10[14 + 133]
Sum = 10 x 147
Sum = 1470
Therefore, the sum of first 20 multiples of 7 will be 1470.
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[Question translation in english -
find the sum of the first 20 multiples of 7 with procedure.]
