-5x+3=7x+2 2x-3<3x-2(2x+3) /3x+1/=2 x-y=1 2x+5y=-6

-5x+3=7x+2 -12x = 2-3 -12x = -1 |: (-12) x = 1/12 2x-3<3x-2(2x+3) 2x - 3< 4x - 6 -2x < -3 | (-2) x > 3/2 = 1,5 /3x+1/=2 3x + 1 = 2 lub 3x + 1 = -2 3x = 1|: 3 3x = -3 | 3 x = 1/3 x = -1 x-y=1 2x+5y=-6 to jest uklad rownan :) x = 1 + y 2 (1 + y) + 5y = -6 x = 1 + y 2 + 2y + 5y = -6 x = 1 + y 7y = -8 | 7 x = 1 + y y = -8/7 x = 1 + (-8/7) y = -8/7 x = 1 - 1 i 1/7 y = -8/7 x = - 1/7 y = -8/7

-5x+3=7x+2 -5x-7x=2-3 -12x= (-1) | ; (-12) x= 1/12 2x-3<3x-2(2x+3) 2x-3<3x-4x-6 2x-3x+4x< -6 +3 3x< -3 | ; 3 x< -1 /3x+1/=2 3x+1=2 , 3x+1 = -2 3x=2-1 , 3x= -2-1 3x= 1 |;3 3x= -3| ; 3 x=1/3 , x = -1 x-y=1 ------>x=1+y 2x+5y=-6 2*(1+y)+5y= -6 2+2y+5y = -6 2y+5y = -6-2 7y=-8 | ; 7 y= (- 8/7) x=1+ (- 8/7 ) x= 1 - 8/7 x=1 - 1 i 1/7 x= - 1/7 x= (- 1/7) y= (-8/7)