rozwiaz rownania 2x+6=20 23+9y = 50 8y-36=24 -4c-46=-2 13+2x=3 -7=x+1 daje naj

2x+6=20 2x = 20 - 6 = 14 x = 14/2 = 7 23+9y = 50 9y = 50 - 23 = 27 y = 27/9 = 3 8y-36=24 8y = 24 + 36 = 60 y = 60/8 = 7,5 -4c-46=-2 - 4c = - 2 + 46 = 44 4c = - 44 c = - 44/4 = - 11 13+2x=3 2x = 3 - 13 2x = - 10 x = - 10/2 = - 5 -7=x+1 x = - 7 - 1 = - 8

2x+6=20 /-6 2x=14 /: 2 x=7 23+9y = 50 /-23 9y=27 /:9 y=3 8y-36=24 /+36 8y=60 /:8 y=7i4/8 -4c-46=-2 /+46 -4c=44 /:4 c=11 13+2x=3 /-13 2x=-10 /:2 x=-5 -7=x+1 /-1 -8=x

2x+6=20 2x=20-6 2x=14 x=7 23+9y = 50 9y=50-23 9y=27 y=3 8y-36=24 8y=24+36 8y=60 y=7,5 -4c-46=-2 -4c=-2+46 -4c=44 c=-11 13+2x=3 2x=3-13 2x=-10 x=-5 -7=x+1 -7-1=x x=-8