1.10+10= 20 2.40+40=80 3.30+30=60 4.100+100=200 5.5+5=10 6.6+6=12 7.4+4=8 8.7+7=14 9.3+3=6 10.1000+1000= 2000 Nw za bardzo o co Ci chodzi więc mi napisz xd
a) -5x + 10 = -2x -8 /+5x+8 18=3x /:3 x=6 b) 7x + 14 = 5x - 22 /-5x-14 2x=-36 /:2 x=-18 c) 3 (x - 4) 2 (2x - 5) = -4 d) -2 (x + 3) + 4 (2x+3) = -6 -2x-6+8x+12=-6 6x+6=-6 /-6 6x=-12 /:6 x=-2 e) (4 - x) - (2x + 3) + (x - 4) = -(2x - 3) - (x - 7) 4-x-2x-3+x-4=-2x+3-x+7 -3-2x=-3x+10 /+3x+3 x=13 f) - (4 - 2x) - (2x + 4) = (3x - 1) + (2x - 5) - (7 - 3x) -4+2x-2x-4=3x-1+2x-5-7+3x -8=8x-13 /+13 4=8x /:4 x=1/2 g) 4x + 5 - (3x + 6) = 2 (2 + x) - 4 4x+5-3x-6=4+2x-4 x-1=2x /-x x=-1 h) x - (7 + 2x) = 2 (x - 1) + 1 x-7-2x=2x-2+1 -x-7=2x-1 /+x+1 -6=3x /:3 x=-2 i) 10 - [2(1 - x) - 3 (2x + 5)] = 2 (x + 5) + 1 10-[2-2x-6x-15]=2x+10+1 10-2+2x+6x+15=2x+11 23+8x=2x+11 /-2x-23 6x=-12 /:6 x=-2 j) 1 - 2x - 3 [2x - (-5 + x)] = x + 4 1-2x-3[2x+5-x]=x+4 1-2x-6x-15+3x=x+4 -14-5x=x+4 /+5x-4 -18=6x /:6 x=3 k) 7/9 + x/2 = 3/2 - x/18 /*18 14+9x=27-x /+x-14 10x=13 /:10 x=1,3