Question

If 17x+23y=40 and 23x+17y=80,then x+y=​

Answer 1

answer:

2.3

step-by-step explanation:

17x+23y=40

23x+17y=80

form eq1

x=(40-23y)/17

form eq2

x=(80-17y)/23

(40-23y)/17=(80-17y)/23

by solving above

y= -1.833

form eq 1

x=(40-23(-1.833))/17

x=4.83288

now

x+y=

4.83288+(-1.833)=2.99982

                             =2.3 (appx.)....(answer)

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