rozwiąż równania. A 4x+7 5x-1 ____ - ____ =x+5 2 6 B x+5 2x+1 1 _____ - _____ = __ (2-x) 4 8 2

A 4x+7 5x-1 ____ - ____ =x+5 2 6 (4x+7)/2-(5x-1)/6=6x+30 |*6 3(4x+7)-(5x-1)=6x+30 12x+21-5x+1-6x=30 12x-5x-6x=30-21-1 x=8 B x+5 2x+1 1 _____ - _____ = __ (2-x) 4 8 2 (x+5)/4-(2x+1)/8=1/2(2-X) |*8 2(x+5)-(2x+1)=4(2-x) 2x+10-2x-1=8-4x 2x-2x+4x=8-10+1 4x=-1 |:4 x=-1/4

4x+7 5x-1 ____ - ____ =x+5 /*6 2 6 3(4x+7)-5x+1 = 6(x+5) 12x+21-5x+1 = 6x+30 7x+22 = 6x+30 /-6x -22 x = 8 B x+5 2x+1 1 _____ - _____ = __ (2-x) /*8 4 8 2 2(x+5)-2x-1 = 4(2-x) 2x+10-2x-1 = 8-4x 9 = 8-4x 4x = -1 x = -1/4