Rozwiąz rownania: 1) 2x+3=x-7 2) 3(x-4)=5 3) 3x+4(x-1)=5x-10 dam naj ;**:)

1) 2x+3=x-7 2x-x=7-3 x=4 2) 3(x-4)=5 3x-12=5 3x=5+12 3x=17/3 x=5 2/3 3) 3x+4(x-1)=5x-10 3x+4x-4=5x-10 3x-5x=-10+4 -2x=-6/(-2) x=3

1) 2x+3=x-7 2x-x = -7-3 x = -10 spr: L= 2 * (-10) + 3 = -20 + 3 = -17 P= -10 - 7 = -17 P=L 2) 3(x-4)=5 3x-12= 5 3x= 5 +12/:3 x= 17:3 x= 5 i 2/3 3) 3x+4(x-1)=5x-10 3x + 4x- 4= 5x-10 7x- 5x = -10 +4 2x = -6/:2 x = -3

1) 2x+3=x-7 |-x x+3=-7 |-3 x=-10 2) 3(x-4)= 5 3x-12=5 |+12 3x=17 |/3 x=5+ 2/3 3) 3x+4(x-1)=5x-10 3x+4x-4=5x-10 |+4 7x=5x-6 |-5x 2x=-6 |/2 x=-3