Mam kilka zadań z matmy. potrzebne na jutro. Bardzo pilne!
a) 5[3(-2 z+1)+4 z]+4(3z-2)=8[3(z-2)-1]+17
b) 4z-3(8z+1)-5(4-3z)=-1+2(4-5z)
c) 12x-11(4x-3)+10(8-5x)+8(8x-13)=0
d) 6(x-2)-(x-1)=6
e) 4(3z+1)-(z+3)=15
f) 9(3-x)-15=5(2+x)
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a)5[-6z+3+4z]+12z-8=8[3z-6-1]+17
-30z+15+20z+12z-8=24z-48-8+17
-30z+20z+12z-24z=-48-8+17-15+8
-54z+32z=-48+17-15
-22z=-46 /:(-22)
z=2 2/22
z=2 1/11
d)6x-12-x+1=6
6x-x=6-1+12
5x=17 /:5
x=3,4
e)12z+4-z-3=15
12z-z=15-4+3
11z=14 /:11
z=14/11
z=1 3/11
f)27-9x-15=10+5x
-9x-5x=10+15-27
-14x=-2 /:(-14)
x=1/7
a) 5[3(-2 z+1)+4 z]+4(3z-2)=8[3(z-2)-1]+17
5[-6z+3+4z]+12z-8=8[3z-6-1]+17
-30z+15+20z-12z-8=24z-48-8+17
-24z+15=24z-39 /+24z;-15
48z=54 /:48
z=1,125
b) 4z-3(8z+1)-5(4-3z)=-1+2(4-5z)
4z-24z-3-20+15z=1+8-10z
-5z-23=-10z+9 /+5z;+23
-5z=32 /:(-5)\
z=6,4
c) 12x-11(4x-3)+10(8-5x)+8(8x-13)=0
12x-44x+33+80-50x+64x-104=0
-18x+9=0 /-9
-18x=-9 /:(18)
x=0,5
d) 6(x-2)-(x-1)=6
6x-12-x+1=6
5x-11=6 /+11
5x=17 /:5
x=3,4
e) 4(3z+1)-(z+3)=15
12z+4-z-3=15
11z+1=15 /-1
11z=14 /:11
z=1 i 3/11
f) 9(3-x)-15=5(2+x)
27-9x-15=10+5x
-9x+12=10+5x /+9x;-10
14x=2 /:14
x=1/7