if 2x+y=5;3x+4y=5 find the value of x+y
Answers
Answered by
2
Step-by-step explanation:
2x+y= 5_____(1)
3x+4y = 5______(2)
Multiply eq (1) by 4 and subtract eq (2) from the resultant
5x = 15
x= 3
Substitute x= 3 in eq(1)
6+y = 5
y= -1
Therefore ,x+y = 2
Answered by
2
Answer:
x+y=2
Step-by-step explanation:
3x+4y=5
-8x-4y=-20
by calculation
=> -5x=-15
=> x=3
by substitution
y=-1
therefore x+y = 3-1 = 2
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