Matemtyka 6 zeszyt cwiczeń (zielone) Zad 12 str 26

a) 3x-1=5x 3x-5x=-1 -2x=-1/:(-2) x=-0,5 b) y-3=9-y y+y=9+3 2y=12/:2 y=6 c) 1/2 z +6=z-1 1/2 z-z=-1-6 - 1/2 z=-7 /*2/1 z=14

a) 3x-1=5x |+1 3x = 5x +1 | -5x -2x = 1 | :(-2) x = - 0,5 b) y-3=9-y |+3 y=12-y |+y 2y = 12 |:2 y =6 c)1/2z + 6 = z -1 | *2 z+6=2z-1 |-6 z = 2z - 7 | -2z -z = -7 | *(-1) z=7