Using a system of equations, the parts are of 14 and 20.
What is a system of equations?
A system of equations is when two or more variables are related, and equations are built to find the values of each variable.
In this problem, the variables are x and y. The total is of 34, hence:
x + y = 34 -> y = 34 - x.
The ratios are given as follows:
[tex]\frac{4}{7}x = \frac{2}{5}y[/tex]
Then:
[tex]\frac{4}{7}x = \frac{2}{5}(34 - x)[/tex]
20x = 14(34 - x)
34x = 34 x 14
x = 14, y = 34 - 14 = 20.
More can be learned about a system of equations at https://brainly.com/question/24342899
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