Question

Solve by elimination method x+y=4;2x-5y =1




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Answer 1

Answer:

Step-by-step explanation:

x + y = 4

2x - 5y = 1

y = x - 4

2x - 5(x - 4 ) = 1

2x - 5x - 20 = 1

-3x = 1 + 20

-3x = 21

x = 21÷-3

x = -7

Substituiting x = -7 in eq .1

-7 + y = 4

y = 4 + 7

y = 11

if there is something wrong then kindly rectify it.

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Answer 2

x+y=4---------(1)

2x-5y=1------(2)
multiplying equation 1by 2 =)
2x+2y=8------(3)
substracting eq2&3
2x+2y=8
-2x-5y=1
-------------
7y=7
y=1
on substituting y=1 in eq 1
x+y=4
x+1=4
x=3