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6x-77-14x+2=-60+4x+3x
-8x-7x=-60+75
-15x=15 /:(-15)
x=-1
b)
3(5x+3)=7(x+5)-3(2-x)
15x+9=7x+35-6+3x
15x-10x=29-9
5x=20 /:5
x=4
c)
2(x-1)+4(x-3)=-3(x-2)+9x
2x-2+4x-12=-3x+6+9x
6x-6x=6+14
0=20 rownanie sprzeczne
d)
5x-3(6-8x)=x-7(x+4)
5x-18+24x=x-7x-28
29x+6x=-28+18
35x=-10 /:35
x=-10/35
x=-2/7
e)
2x+8(2x-3)-6(x-3)=5(3x+1)+2x-11
2x+16x-24-6x+18=15x+5+2x-11
12x-17x=-6+6
-5x=0
x=0
f)
3(2x+3)-5(x-2)-4(x+7)=3
6x+9-5x+10-4x-28=3
-3x=3+9
-3x=12 /:(-3)
x=-4
g)
6(3,5-1,2x)=5(-3,5x+1,2)+0,3x
21-7,2x=-17,5x+6+0,3x
-7,2x+17,2x=6-21
10x=-15 /:10
x=-1,5
6x-77-14x+2=-60+4x+3x
6x-14x-4x-3x= -60-2+77
-15x=15/:(-15)
x= -1
b)3(5x+3)=7(x+5)-3(2-x)
15x+9=7x+35-6+3x
15x-7x-3x=35-6-9
5x=20/:5
x=4
c)2(x-1)+4(x-3)=-3(x-2)+9x
2x-2+4x-12=-3x+6+9x
2x+4x+3x-9x=6+2+12
0=20
równanie sprzeczne
d)5x-3(6-8x)=x-7(x+4)
5x-18+24x=x-7x-28
5x+24x-x+7x= -28+18
35x=-10/:35
x= -2/7
e)2x+8(2x-3)-6(x-3)=5(3x+1)+2x-11
2x+16x-24-6x+18=15x+5+2x-11
2x+16x-6x-15x-2x=5-11-18+24
-5x=0/:(-5)
x=0
f)3(2x+3)-5(x-2)-4(x+7)=3
6x+9-5x+10-4x-28=3
6x-5x-4x=3+28-10-9
-3x=12/:(-3)
x= -4
g)6(3,5-1,2x)=5(-3,5x+1,2)+0,3x
19,5-7,2x=-16,5x+6+0,3x
-7,2x+16,5x-0,3x=6-19,5
9x= -13,5/:9
x= -1,5