a)3-x=2x+1 b)1/2x+3=x-3 c)6x-(10-2x)=3x+5

Rozwiązanie w załączniku

a) 3 - x = 2x + 1 -x - 2x= 1 - 3 -3x = - 2 x= - 2 : (-3) x= 2/3 spr. 3-x = 2x+ 1 L=3 -x= 3 - 2/3= 2 i 3/3 - 2/3= 2 i 1/3 P= 2x+ 1= 2 * 2/3 +1 = 4/3+1= 1 i 1/3 + 1= 2 i 1/3 L=P b) 1/2x + 3 = x-3 1/2x -x = - 3 -3 -1/2x= - 6 x= - 6 : (-1/2) x= - 6 * (-2/1) x= 12 spr. 1/2x + 3 = x- 3 L= 1/2x+3= 1/2 * 12 + 3= 1/1 * 6 + 3= 6+3= 9 P= x-3= 12-3=9 L=P c) 6x - (10 - 2x) = 3x + 5 6x - 10 + 2x= 3x + 5 8x - 10 = 3x + 5 8x - 3x= 5 + 10 5x= 15 x= 15: 5 x= 3 spr. 6x - (10 - 2x) = 3x+5 L= 6x - (10 - 2x) = 6 * 3 - (10 - 2*3) = 18 - (10 - 6) 18 - 4= 14 P= 3x + 5= 3*3 + 5= 9 + 5= 14 L=P