Solve the following pair of linear equations: `x/a-y/b=0, ax + by = a^2+b^2`

Solve the following pair of linear equation graphically : 2x + y - 6 = 0 ., 4x - 2y - 4 = 0.

Solve the following pair of linear equations by substitution method : x+y=a+b , ax-by= a^2-b^2 .

Solve the following pair of linear equations by substitution method : ax+by = a^2 , bx+ay= b^2 .

Solve the following pair of linear equations by substitution method : 2/x + 3/y =2, 3/x+2/y= 2 1/6 .

Solve the following pair of linear equations by the substitution method : 3x /2-5y /3= -2 , x/3+y/2=13/6 .

Solve the following pair of linear equations by substitution method : (2x^2+7)/x=2x+1 , 5x+y=40 .

Solve the following pair of linear equations by the substitution method : 0.2x+0.3y=1.3, 0.4x+0.5y=2.3 .