13x-8(3x-2)=-7x-5(12-3x) 13x-24x+16=-7x-60+15x -11x+16=8x-60 -19x=-76 /19 x=4 7(2x-1)-6(11-x)=3(x+4) 14x-7-66+6x=3x+12 20x-73=3x+12 17x=-85 /17 x=-5 (x+5)(x+2)-3(4x-3)=(x-5)² x²+2x+5x+4-12x+9=x²+25-10x -5x+13=-10x+25 5x=12 /5 12-2(x-1)²=4(x-2)-(x-3)(2x-5) 12-2(x²+1-2x)=4x-8-(2x²-5x-6x+15) 12-2x²-2+4x=4x-8-2x²+5x+6x-15 4x+10=15x-23 -11x=-33 /-11 x=3 x=2 i 2/5
A)13x-8(3x-2)=-7x-5(12-3x) 13x-24x+16=-7x-60+15x 13x-24x+7x-15x=-60-16 -19x=-76 /:(-19) x=4 B)7(2x-1)-6(11-x)=3(x+4) 14x-7-66+6x=3x+12 14x+6x-3x=12+66+7 17x=85 /:(17) x=5 C)(x+5)(x+2)-3(4x-3)=(x-5)² x²+2x+5x+10-12x+9=x²-5² x²+2x+5x-12x-x²=25-9-10 -5x=6 /:(-5) x=-1.2 D)12-2(x-1)²=4(x-2)-(x-3)(2x-5) 12-2(x²-1²)=4x-8-(2x²-5x-6x+15) 12-2x²+2=4x-8-2x²+5x+6x-15 -2x²-4x+2x²-5x-6x=-15-8-2-12 -15x=-43 x=2,8666.....
