Respuesta :

[tex] A= \frac{1}{2} h (x+y) [/tex]

we have to solve for x , solving for x means , we have to isolate x one one side , by shifting all other variables to other side

So

[tex] A= \frac{1}{2} h (x+y) [/tex]

Multiply both sides by 2

2A = h(x+y)

Divide both sides by h

2A/h = x+y

Subtract y from both sides

[tex] \frac{2A}{h} -y =x [/tex]

or

[tex] x=\frac{2A}{h} -y [/tex]