Question

x/3 +y/4 =1 and 5x/6 -y/3=-7 by substitution method

Answer 1

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x/3 + y/4= 1   5x/6 -y/3= -7

lcm

4x+3y=12        5x-2y= - 42

x= 12-3y/4

5(12-3y/4) - 2y = -42

60-15y/4 - 2y = -42

again lcm of 4,1

60-15y-8y= -  168

-23y =  -168- 60

-23y=  -228

y=  -228/-23

y= 9.91

x= 12-3y/4

        = 12-3(9.91)/4

      12-  29.73/4

        =  - 17.73/4

         = 4.43