Question

3x+5y=9and5x+3y=7findx+y​

Answer 1

Answer:

the answer x+y=5/2

Step-by-step explanation:

3x+5y=9 - equation 1

5x+3y=7 - equation 2

eq(1)-eq(2)

eq(1)×5= 15x+25y=45

eq(2)×3=15x+9y=21

16y=24

y=3/2

substitute y=3/2 in eq(1)

3x+4×(3/2)=9

3x+6=9

3x=9-6

3x=3

x=1

x+y=1+(3/2)

x+y=5/2

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