If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
(1/2)*x-((4/5)*y) = 19 // - 19
(1/2)*x-((4/5)*y)-19 = 0
(1/2)*x+(-4/5)*y-19 = 0
1/2*x-4/5*y-19 = 0 // + -4/5*y-19
1/2*x = -(-4/5*y-19) // : 1/2
x = (-(-4/5*y-19))/1/2
x = 2*(19-(-4/5*y))
x = 2*(19-(-4/5*y))
| f(x)=2secx | | 2(w+4)=7(w-11) | | 7+-x+3=9x+10 | | 2x^2+2y=48 | | 4m^2-42=17m | | 7(b+3)+2(-4b+5)=b+8+5 | | x+5/6=5/3+x-2/4 | | 8x+1=-x+-1 | | 2d=(a-b)/(b-c) | | (x^2-6x+9)*(3x-4)=0 | | 2(x-3)=16+2x | | 15t-4=11-16 | | 4x-2+x=2+2x | | -54=-4(3+6p)-6(4p+7) | | 8(7+2x)=-8(x-4) | | (3^9-3*4)/3 | | X-12+x=2x-24+2x-20 | | 3/2x+1/5=11/6x-2/15 | | 21x+3y=-12 | | 66-3p=899 | | 9+12=4x+3 | | N-1.6+5.1n=-5.87 | | 6.6=4*x/100 | | (2x-9)(3x-8)=0 | | 7x/12=5x/7-11 | | x(67+25)=350+25x | | 2x-4y=10x+6y | | n-84=21 | | -6=-4+5(-2x-18) | | 12-4y=20 | | 10(3+3n)=9+9n | | -2-6(v+3)=-4(v-2) |