1. 10x - 8 = 3x -22 10x - 3x = -22 + 8 7x = -14 x = -14 : 7 x = -2 spr. L = 10x - 8 = 10*(-2) - 8 = -20 - 8 = -28 P = 3x - 22 = 3*(-2) - 22 = -6 - 22 = -28 L = P 2. 4(x - 1) + 4 + 4x = 6x - 8 4x - 4 + 4 + 4x = 6x - 8 8x = 6x - 8 8x - 6x =-8 2x = -8 x = -8 : 2 x = -4 3. 2(3x + 2 ) - 4x = 3(x+1) + 3 6x + 4 - 4x = 3x + 3 + 3 2x + 4 = 3x + 6 2x - 3x = 6 - 4 -x = 2 x = -2 Pamietaj o jednym, wyrażenie zmienia stronę, zmienia znak :)
1. 10x-3x=8-22 7x=-14/:7 x=-2 spr. (10*(-2))-8=(3*(-2))-22 -20-8=-6-22 -28=-28 2. 4x-4+4+4x=6x-8 4x+4x-6x=4-4-8 2x=-8/:2 x=-4 spr. 4(-4-1)+4+(4*(-4))=(6*(-4))-8 -16-4+4-16=-24-8 -32=-32 3. 6x+4-4x=3x+3+3 6x-4x-3x=-4+3+3 -1x=10/:(-1) x=-10 spr. 2((3*(-10))+2)-(4*(-10))= 3(-10+1)+3 -60+4+40=-30+3+3 -24=-24