Question

3x+8y=10 ; 9x+3y=12 find x+y​

Answer 1

Step-by-step explanation:

3x + 8y = 10 ...eq.(i)

9x + 3y = 12 ...eq.(ii)

multiply equation 1 with 3

9x + 24y  = 30

eq(i) - eq(ii)

9x + 24y = 30

_

9x +3y=12

=

21y=18

y = 18/21

by putting value of y in eq2

9x + 18/7 =12

9x = 66/7

x =66/63

=22/21

therfore x+y= 40/21

Answer 2

Answer:

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