Odpowiedź:
a)
3(2x+3)=5(2-x)-15x
6x+9=10-5x-15x
6x+9=10-20x
6x+20x=10-9
26x=1
x=1/26
b)
6(x+1)-4(x-1)=3
6x+6-4x+4=3
2x+10=3
2x=3-10
2x=-7
x=-7/2
c)
3(4x+7)-(5x-1)=6x+30
12x+21-5x+1=6x+30
7x+22=6x+30
7x-6x=30-22
x=8
d)
x+5/4-2x+1/8=1-1/2x
2(x+5)-(2x+1)=8-4x
2x+10-2x-1=8-4x
9=8-4x
4x=8-9
4x=-1
x=-1/4
