Question

x+y= 180--------1eq

x=y+18----2eq
y=x-18.----3eq

find ans by both 3rd eq and 2nd eq

is ans x=94 or 99
or y=94or 81
must found ans by ,both 3rd eq and 2nd eq

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Answer 1

Step-by-step explanation:

x−y=18(eq.1)

x+y=180(eq.2)

by adding both the equation

we get,

2x=198

x=198÷2

x=99

putting the value of x in eq.1

99−y=18

−y=18−99

−y=−81

y = 81

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