Question

Równania.1)x+5=-10
2)1+5x=16+2x
3)2x+2=x+4
4)x+3-(x+4)=11
5)(5x+6)-2(x-2)=x-2-(x-3)
6)2(x-5)+15=3(x-4)+10
7)(y-1)2y-2ydo kwadratu=4
8)(x+1)(x-1)-3x= xdo kwadradu+2
9)(2x-5)2x=4(xdokwadratu+1)+1
10)2x-4=5+1
11)9x-6(x-1)=5(x+2)-3

Answer 1

1)
x+5=-10
x=-10-5
x=-15
-------------------------------------
2)
1+5x=16+2x
5x-2x=16-1
3x=15     /:3
x=5
-------------------------------------
3)
2x+2=x+4
2x-x=4-2
x=2
-------------------------------------
4)
x+3-(x+4)=11
x+3-x-4=11
0≠8
x∈Ф
--------------------------------------
5)
(5x+6)-2(x-2)=x-2-(x-3)
5x+6-2x+4=x-2-x+3
5x-2x-x+x=-2+3-6-4
3x=-9     /:3
x=-3
------------------------------------
6)
2(x+5)+15=3(x-4)+10
2x+10+15=3x-12+10
2x+25=3x-2
2x-3x=-2-25
-x=-27   /:(-1)
x=27
------------------------------------
7)
(y-1)2y-2y²=4
2y²-2y-2y²=4
-2y=4     /:(-2)
y=-2
------------------------------------
8)
(x+1)(x-1)-3x=x²
x²-1-3x=x²
-3x=1   /:(-3)
x=-1/3
------------------------------------
9)
(2x-5)2x=4(x²+1)+1
4x²-10x=4x²+x+1
-11x=1   /:(-11)
x=-1/11
------------------------------------
10)
2x-4=5+1
2x=5+1+4
2x=10   /:2
x=5
-----------------------------------
11)
9x-6(x-1)=5(x+2)-3
9x-6x+6=5x+10-3
3x-5x=10-3-6
-2x=1   /:(-2)
x=-1/2