Question

despejar x en
ax+bx-2y=0

Answer 1

ax+bx-2y=0
ax+bx=2y
x(a+b)=2y
x(a+b)=2y
x=2y/a+b

Answer 2

Tenemos : 

ax + bx - 2y = 0

Despejamos x

ax + bx = 2y

x (a + b) = 2y

x (a + b) / (a + b) = (2y) / (a + b)

x = (2y) / (a + b)

Solución : 

x = (2y) / (a + b)