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a) 3(x-4)-4(2x-7)=2(x+5)
3x-12-8x+28=2x+10
3x-8x-2x=10+12-28
-7x=-6/:-7
x=6/7
b) 2(2x-3)+3(4-x)=-(x+1)
4x-6+12-3x=-x-1
4x-3x+x=-1+6-12
2x=-7/:2
x=-3 i 1/2
c) 2(x-3)-4(3+x)=-3(x+2)+2(2x-1)
2x-6-12-4x=-3x-6+4x-2
2x-4x+3x-4x=-6-2+6+12
-3x=10/:-3
x=-3 i 1/3
d) 6(x+1)+3(2-x)=2(2x-1)-(4-x)
6x+6+6-3x=4x-2-4+x
6x-3x-4x-x=-2-4-6-6
-2x=-18/:-2
x=9
zad.2
a) 2(x-7)-3(x+2)=4(x+3)+2(x-9)
2x-14-3x-6=4x+12+2x-18
2x-3x-4x-2x=12-18+14+6
-7x=14/:-7
x=-2
b) -3(x+6)-6(2x+8)=-2(4-x)+9(x+8)
-3x-18-12x-48=-8+2x+9x+72
-3x-12x-2x-9x=-8+72+18+4
-26x=86/:-26
x=3 i 8/26
c) -8(x+2)+3(x+5)=-2(2x+3)+4(2x-1)
-8x-16+3x+15=-4x-6+8x-4
-8x+3x+4x-8x=-6-4+16-15
-9x=-9
x=1
d) 6(4-x)+5(2x-5)=4(x-1)-3(4-x)
24-6x+10x-25=4x-4-12+3x
-6x+10x-4x-3x=-4-12-24+25
-3x=-15/:-3
x=5
a) 3(x-4)-4(2x-7)=2(x+5)
3x-12-8x+28=2x+10
3x-8x-2x=10+12-28
-7x=-6/:-7
x=6/7
b) 2(2x-3)+3(4-x)=-(x+1)
4x-6+12-3x=-x-1
4x-3x+x=-1+6-12
2x=-7/:2
x=-3,5
c) 2(x-3)-4(3+x)=-3(x+2)+2(2x-1)
2x-6-12-4x=-3x-6+4x-2
2x-4x+3x-4x=-2-6+6+12
-3x=10/:-3
x=-10/3=-3 1/3
d) 6(x+1)+3(2-x)=2(2x-1)-(4-x)
6x+6+6-3x=4x-2-4+x
6x-3x-4x-x=-2-4-6-6
-2x=-18/:-2
x=9
2.
a) 2(x-7)-3(x+2)=4(x+3)+2(x-9)
2x-14-3x-6=4x+12+2x-18
2x-3x-4x-2x=-18+12+6+14
-7x=14/:-7
x=-2
b) -3(x+6)-6(2x+8)=-2(4-x)+9(x+8)
-3x-18-12x-48=-8+2x+9x+72
-3x-12x-2x-9x=72-8+48+18
-26x=130/:-26
x=-5
c) -8(x+2)+3(x+5)=-2(2x+3)+4(2x-1)
-8x-16+3x+15=-4x-6+8x-4
-8x+3x+4x-8x=-6-4-15+16
-9x=-9/:-9
x=1
d) 6(4-x)+5(2x-5)=4(x-1)-3(4-x)
24-6x+10x-25=4x-4-12+3x
-6x+10x-4x-3x=-12-4+25-24
-3x=-15/:-3
x=5
a) 3(x-4)-4(2x-7)=2(x+5)
3x-12-8x+28=2x+10
-5x+16=2x+10
-5x-2x=10-16
-7x=-6/:-7
x= 6/7 <- ułamek
b) 2(2x-3)+3(4-x)=-(x+1)
4x-6+12-3x=-x-1
x+6=-x-1
x+x=-1-6
2x=-7/:2
x=-3,5
c) 2(x-3)-4(3+x)=-3(x+2)+2(2x-1)
2x-6-12-4x=-3x-6+4x-2
-2x-18=x-8
-2x-x=-8+18
-3x=10/:-3
x= -10/3
x= -3 1/3 <- ułamek
d) 6(x+1)+3(2-x)=2(2x-1)-(4-x)
6x+6+6-3x=4x-2-4+x
3x+12=5x-6
3x-5x=-6-12
-2x=-18/:-2
x=9
Zad.2
a) 2(x-7)-3(x+2)=4(x+3)+2(x-9)
2x-14-3x-6=4x+12+2x-18
-x-20=6x-6
-x-6x=-6+20
-7x=14/:-7
x=-2
b) -3(x+6)-6(2x+8)=-2(4-x)+9(x+8)
-3x-18-12x-48=-8+2x+9x+72
-15x-66=64+11x
-15x-11x=64+66
-26x=130/:-26
x= -5
c) -8(x+2)+3(x+5)=-2(2x+3)+4(2x-1)
-8x-16+3x+15=-4x-6+8x-4
-5x-1=4x-10
-5x-4x=-10+1
-9x=-9/:-9
x=1
d) 6(4-x)+5(2x-5)=4(x-1)-3(4-x)
24-6x+10x-25=4x-4-12+3x
-1+4x=7x-16
4x-7x=-16+1
-3x=-15/:-3
x=5