Question

If 3x+5y=9 and 5x+3y=7 , find the value of x+y

Answer 1

Answer:

X=1/2 and Y=3/2

Step-by-step explanation:

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Answer 2

Answer:

5x+3y=7. ===> x = (7-3y) /5

sub in 3x+5y=9,

3[ (7-3y) /5 ]+5y = 9

21-9y+25y = 45

16y = 24

y = 3/2 in (x = (7-3y) /5)

x = (7-3y) /5

x= = {7-3(3/2)}/5 = (7-9/2) /5 = (14-9)/10 = 1/2

x = 1/2, y = 3/2

x+y = 3/2+1/2 = 2