2x+9x=x-7 11x-x=-7 10x=-7 |/10 x=-0,7 5x-3=7x-12 5x-7x=-12+3 -2x=-9 |/(-2) x=4,5 3(x-2)=x+4 3x-6=x+4 3x-x=4+6 2x=10 |/2 x=5 x/5 + 2 =x |*5 x+10=5x x-5x=-10 -4x=-10 |/(-4) x=2,5 2 oblicz a) 12 +19 +(-51) = 31-51= -20 B)14-72=-58 c)3*4-5=12-5=7 d)100-12*14=100-168=-68 e)13*7-11*8=91-88=3 f)74-13+10*(-4)=61-40=21
2x+9x=x-7 10x=-7 x=-7/10 5x-3=7x-12 -2x=-9 x=9/2 3(x-2)=x+4 3x-x=4+6 2x=10 x=5 x/5 + 2 =x /*5 x-5x=-10 -4x=-10 x=10/4 2 oblicz a) 12 +19 +(-51)=31-51=-20 B)14-72=-58 c)3*4-5=12-5=7 d)100-12*14=100-168=-68 e)13*7-11*8=91-88=3 f)74-13+10*(-4)=61-40=21
Rozwiąż równania 2x+9x=x-7 => 10x=-7 => x=-10/7 5x-3=7x-12 => 12x=-9 => x=-9/12 3(x-2)=x+4 => 3x-6=x+4 => 2x=10 => x=5 x/5 + 2 =x => x-5=-2 => x=3 2 oblicz a) 12 +19 +(-51) = -20 B)14-72= -58 c)3*4-5=7 d)100-12*14= -68 e)13*7-11*8= 3 f)74-13+10*(-4)= -446 Jak cos nie jasne daj znac
