twenty from is divided into two parts such that 7 times the first part added to 5 times the second party mekes 146 .find each part .
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First part=x
Second part=y
7x+5y=146&x+y=20
Multiple x+y=20with5
5x+5y=100
(7x+5y=146)-(5x+5y=100)
Therefore 2x=46
x=23
Substitute x inx+y=20
Therefore y=-3
Second part=y
7x+5y=146&x+y=20
Multiple x+y=20with5
5x+5y=100
(7x+5y=146)-(5x+5y=100)
Therefore 2x=46
x=23
Substitute x inx+y=20
Therefore y=-3
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