Question

Wyznacz x :

m+x = k+x

n

2x -3a =x/4

b

Answer 1

(m+x)/n = k+x     /*n

m+x = nk + xn

x -xn = nk - m

x(1-n) = nk-m    /: (1-n)

x = (nk-m)/(1-n)

 

2x/b – 3a = x/4      /*4

8x/b – 12a = x    /*b

8x – 12a = xb

8x – xb = 12a

x(8-b) = 12a    /: (8-b)

x = 12a/(8-b)