Question

Rozwiąż równania:

1. 3x+5=17


2. 4(2x-3)=6(1+x)


3. 3(x-1)+(x-5)=4(x-2)


4. 3x+4/2 = 2x+3/3


5. 4x+7/2 - 5x - 1/6 = x+5

Answer 1

1.
3x+5=17
3x=17-5
3x=12
x=4


2.
4(2x-3)=6(1+x)
8x-12=6+6x
8x-6x=6+12
2x=18
x=9


3.
3(x-1)+(x-5)=4(x-2)
3x-3+x-5=4x-8
3x+x-4x=-8+3+5
0=0


4.
3x+4/2 = 2x+3/3
9x+12=4x+6
9x-4x=6-12
5x=-6
x=-1,2


5.
4x+7/2 - 5x - 1/6 = x+5 | *6
12x+21-5x+1=6x+30
12x-5x-6x=30-21-1
x=8