Solve `(x)/(6)+(y)/(15)=4`,`(x)/(3)-(y)/(12)=(19)/(4)`

{:((x)/(3) + (y)/(15) = 4),((x)/(3) - (y)/(12) = (19)/(4)):}

Solve the following paris of linear (simultaneous) equation using method of elimination by substution: (x)/(6) + (y)/(15) = 4 (x)/(3) - (y)/(12) = 4(3)/(4)

Solve the following pair of equations: (x)/(3) + (y)/(4)= 4, (5x)/(6)-(y)/(8)=4

Solve : (2x)(3)+(y/4=12 , (4x)/3-(9y)/4=2

Solve for x and y : x+(y)/(4)=11," "(5x)/(6)-(y)/(3)=7

Solve for x and y in (13)/(x-3)-(6)/(y+1)=19;(21)/(x-3)+(11)/(y+3)=10

(2) Solve (dy)/(dx)=(x+y+4)/(x+y-6)

Solve : {:((34)/(3x+4y)+(15)/(3x-2y)=5),((25)/(3x-2y)-(8.50)/(3x+4y)=4.5):}

Solve 3x - y = 23 and (x)/(3) + (y)/(4) = 4.