X+7=2x-8 -x+7=2x-8 3+y=2.7+4y 4y-1.8=-5y+3.6 2(x-4)=x-0.5 3(a+23)=4(a-4) (b++6)=3 6-(5+a)=67+(-7a-12) 0.3(x-2)-0.2(x+4)=-2.9 0.6(x+7)-0.5(x-3)=-6.8
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Ответы на вопрос:
x+7=2x-8
-x=-15
x=15
-x+7=2x-8
-3x=-15
x=-15/(-3)
x=5
3+y=2.7+4y
-3y=-0.3
y=-0.3/(-3)
y=0.1
4y-1.8=-5y+3.6
9y=5.4
y=5.4/9
y=0.6
2(x-4)=x-0.5
2x-8=x-0.5
x=7.5
3(a+23)=4(a-4)
3a+69=4a-16
-a=-85
a=85
(b++6)=3
b+7-5b-6=3
-4b=2
b=2/(-4)
b=-0.5
6-(5+a)=67+(-7a-12)
6-5-a=67-7a-12
6a=54
a=54/6
a=9
0.3(x-2)-0.2(x+4)=-2.9
0.3x-0.6-0.2x-0.8=-2.9
0.1x=-1.3
x=-1.3/0.1
x=-13
0.6(x+7)-0.5(x-3)=-6.8
0.6x+4.2-0.5x+1.5=-6.8
0.1x=-12.5
x=-12.5/0.1
x=-125.
х₁ = 2; х₂ = -1
Пошаговое объяснение:
По теореме Виета
х₁+х₂=1
х₁*х₂=-2
х₁ = 2; х₂ = -1
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