Mathematics: Given these equations x+y=9.0 0.50x+0.20y=4.05

He would have $658.125, which is rounded to $658....

Given these equations x+y=9.0 0.50x+0.20y=4.05 - id900500204053112742, mathman783

officialalex8635

06.01.2022

Step-by-step explanation:

Given are two simultaneous equation in two variables x and y as

$x+y =9\\0.5x+0.2y = 4.05$

To solve this let us multiply second equation by 5

$x+y =9\\2.5x+y = 20.25\\----------------------\\-1.5x =-11.25\\x = 7.5$

Substitute x value in I equation to get

$7.5+y =9\\y =1.5$

So solution set is

$x=7.5\\y=1.5$

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