Wskaz liczbe ktora jest rozwiazaniem rownaina 2-½(4x+6) =5x-1 a) 3 b)2 c )1 d)0 Podstaw kazda liczbe i rozwiaz.

2-½(4x+6) =5x-1 2-2x-3=5x-1 -2x-5x=-1-2+3 -7x=0 x=0 d) 2-½(4*3+6) =5*3-1 2-1/2*18=14 -7=14 2-½(4*2+6) =5*2-1 2-1/2*14=9 -5=9 2-½(4*1+6) =5*1-1 2-1/2*10=4 -3=4 2-½(4*0+6) =5*0-1 2-1/2*6=-1 -1=-1

2-½(4x+6)=5x-1 2-2x-3=5x-1 -2x-5x=-1-2+3 -7x=0 x=0 czyli odp. d jest dobra spr. a] x=3 2-½(4×3+6)=5×3-1 2-9=14 -7≠14 b] x=2 2-½(4×2+6)=5×2-1 2-7=9 -5≠9 c]x=1 2-½(4+6)=5-1 2-5=4 -3≠4 d]x=0 2-½(4×0+6)=5×0-1 2-3=-1 -1=-1

2-½(4x+6) =5x-1 a) 3 b)2 c )1 d)0 a) 2 - 1/2(4 * 3 + 6) = 5 * 3 - 1 2 - 1/2(12 + 6) = 15 - 1 2 - 1/2 * 18 = 14 2 - 9 = 14 -7 ≠ 14 b) 2 - 1/2(4 * 2 + 6) = 5 * 2 - 1 2 - 1/2(8 + 6) = 10 - 1 2 - 1/2 * 14 = 9 2 - 7 = 9 -5 ≠ 9 c) 2 - 1/2(4 * 1 + 6) = 5 * 1 - 1 2 - 1/2(4 + 6) = 5 - 1 2 - 1/2 * 10 = 4 2 - 5 = 4 -3 ≠ 4 d) 2 - 1/2(4 * 0 + 6) = 5 * 0 - 1 2 - 1/2(0 + 6) = 0 - 1 2 - 1/2 * 6 = -1 2 - 3 = -1 -1 = -1