<span>4(0,25-6)=8(0,125х+3),
4(-5,75)=х+24,
-23=х+24,
-х=24+23,
-х=47,
х=-47.
Ответ: -47.</span>
-0,7х+2=65
-0,7х=65-2
-0,7х=63
х= -90
Ответ: -90.
(х-3)(х+4)-(х-2)(х+3) =
=(х²+4х-3х-12) - (х²+3х-2х-6)=
= х²+х-12-х²-х+6=
= -12+6=-6
<span>1-у=3х 2-у=-2х. 3-у=-х-3
</span><span>1-у=-6 7=y
2-у=4 -2=y
3-у=6 -3=y
</span><span>1-у=-3 y=4
2-у=2 0=y
3-у=-4 y=7
</span><span>1-у=0 y=1
2-у=0 y=2
3-у=-3 y=6
</span><span>1-у=6 -5=y
2-у=-4 y=6
3-у=-5 y=8</span>