<span><span> 03.04.2014 </span><span> 5x=9. 8-10x+15-13+6x=0
X=9/5. -4x=-6
X=3/2 </span></span>
1)(713+529)-413 = 713 + 529 - 413 = 713 - 413 + 529 = 300 + 529 = 829
2)624-(137+224) = 624 - 137 - 224 = 624 - 224 - 137 = 400 - 137 = 263
17-12(x+1)=9-3
17-12x-12=6
5-12x=6
12x=5-6
x=-1/12
(16y-24)(1.2+0.4y)=0
16y-24=0 1.2+0.4y=0
16y=24 0.4y=-1.2
y=24:16 y=-1.2:0.4
y=1.5 y=-3
11x-(3x+8)=8x+5
11x-3x-8=8x+5
8x-8=8x+5
8x-8x=5+8
0=11
нет решений