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b)7-2x7x-2
?????
c)2/3(6x-9)=12
4x-6=12
4x=18
x=4,5
d)1/10(25x-40)+2=3/4(8x+12)-
2,5x-4+2=6x+9
-3½x=11
x=-3¹/₇
Zad 2 Rozwiąż nierównośc.
a)4x-2<6
4x<8
x<2
b)⅕x>6-⅘x
x>6
c)25>3x+10
-3x>-15
x<5
d)-2x-4>-5x+5
3x>9
x>3
e)4(1/2x-3/4)<0
2x-3<0
2x<3
x<1½
F)3-2(x-5)>4(2x+1)-1
3-2x+10>8x+4-1
-2x+13>8x+5
-10x>-8
x<0,8
g)3(4x-1)+2(5x+1)<10
12x-3+10x+2<10
22x-1<10
22x<11
x<11/22
b)=17x2+5
c)=2x-6
d)5/2x-4+2=6x+9-9=
5/2x-2=6x/ -5/2x
-2=7/2x /:7/2
x=-5
a)4x-2>6/+2
4x>8
x>2
b)1/5x>6-4:5x/*5x
x2>10
x>pierwiastek z 10
c)25>3x+10/-10
15>3x
x<5
d)-2x-4>-5x+5
3x>9
x>3
e)4(1/2x-3/4)<0
2x-3<0
2x<3
x<1,5
f)3-2(x-5)>4(2x+1)-1
3-2x+10>8x+4-1
13-2x>8x+3
10>6x
x<10/6
g)3(4x-1)+2(5x+1)<10
12x-3+10+2<10
22x-1<10
22x<11
x<0,5