Odpowiedź:
5a+M=N /-M
5a=N-M /:5
a=N-M/5
ax-y=z /+y
ax=z+y /:x
a=z+y/x
u+4a=W /-u
4a=w-u /:4
a=w-u/4
Ba-c=d /+c
ba=d+c /:b
a=d+c/b
5p+ar=3 /-5p
ar=3-5p /:r
a= 3-5p/r
mn-6a=b /-mn
-6a=b-mn /:(-6)
a=b-mn/-6
-3r+2a=1 /+3r
2a=1+3r /:2
a=1+3r/2
