Odpowiedź:
A)
3(2x+3)=5(2-x)-15
6x+9=10-5x-15x
6x+9=10-20x
6x+20x=10-9
26x=1
[tex] x = \frac{1}{26 } [/tex]
B)
6(x+1)-4(x-1)=3
6x+6-4x+4=3
2x+10=3
2x=3-10
2x=-7
[tex]x = - \frac{7}{2} [/tex]
C)
3(4x+7)-(5x-1)=6x+30
12x+21-5x+1=6x+30
7x+22=6x+30
7x-6x=30-22
[tex]x = 8[/tex]
D)
[tex] \frac{x + 5}{4} - \frac{2x + 1}{8} = 1 - \frac{1}{2} x[/tex]
2(x+5)-(2x+1)=8-4x
2x+10-2x-1=8-4x
9=8-4x
4x=8-9
4x=-1
[tex]x = - \frac{1}{4} [/tex]
