oblicz, -2-12=-3z-13 8x+5=7x -z+25=2x-2

-2 - 12 = - 3z - 13 -14 = -3z - 13 3z = 1 /:3 z = 1/3 8x + 5 = 7x x = -5 -z + 25 = 2x = 2 -z - 2x = -23

-2-12=-3z-13 3z=-13+2+12 3z=1//:3 z=1/3 8x+5=7x 8x-7x=-5 1x=-5//:1 x=-5

-3z=-13+2+12 -3z=-13+14 -3z=1/-3 z=-1/3 8x-7x=-5 x=-5 -z-2x=-2-25 -z=-27/-1 z=27 -2x=-27/-2 x=13,5