Question

Proszę was o pomoc rozwiąż równania
1.2x-4=4x-14/7
2.5x+1=26
3.7x-2=3x+6
4.3(x-2)+7x=2(x+4)-6
5.5x(x-6)+25=10
6.-6x=2x-4
7.x-7=(7-x)-(14-2x)
8.x-4x+(2x+3)=6(3-x)
9.x-6x+1/2=1/3
10.x/6-x/4=x/2+7

/-to ułamek

Answer 1

1.
2x-4=4x-14/7
2x-4x=4-14/7
-2x=4-2
-2x=2  l:(-2)
x= -1

2.
5x+1=26
5x=26-1
5x=25  l:5
x=5

3.
7x-2=3x+6
7x-3x=6+2
4x=8  l:4
x=2

4.
3(x-2)+7x=2(x+4)-6
3x-6+7x=2x+8-6
3x+7x-2x=8-6+6
8x=8  l:8
x=1


5.
5x(x-6)+25=10
5x²-30x+25=10
5x²-30x=10-25
5x²-30x= -15

6.
-6x=2x-4
-6x-2x=-4
-8x=-4  l:(-8)
x=1/2

7.
x-7=(7-x)-(14-2x)
x-7=7-x-14+2
x+x=7+7-14+2
2x=2   l:2
x=1

8.
x-4x+(2x+3)=6(3-x)
x-4x+2x+3=18-6x
x-4x+2x+6x=18-3
5x=15  l:5
x=3

9.
x-6x+1/2=1/3
-5x=1/3- 1/2
-5x= 2/6-3/6
-5x= - 1/6  l:(-5)
x=1/30

10.
x/6-x/4=x/2+7
x/6 - x/4 - x/2=7
2x/12 - 3x/12 - 4x/12= 7
-5x/12=7
5x= 7 · (-12)
5x=84  l:5
x=16,8