Question

Va roggg!!! Dau coroana
Plsssss

Answer 1

l.1.

a)x=7+5=12

b)-2x=22

x=-11

2.a)x€{1,9}

b)x€{-5}

3.a)x€{19,20,21,22,23,...}

b)x€{-7,-8,-9,-10,-11...}

4.a)12

b)4

ll.1.a)4(x-2)-3(x+6)=2(x-4)

4x-8-3x-18=2x-8

x-26=2x-8

-x=18

x=-18

b)5-2(x-1)>3(2-x)-5

5-2x+2>6-3x-5

7-2x>1-3x

x>-6

x€{-5,-4,-3,-2,-1,0,1,2,3,...}

3.(m-2)=(f-2)×7

m-2=7f-14

m=7f-12

m+f=36

m=36-f

36-f=7f-12

8f=48

f=6

4.

a+b=306

a:b=3 rest 22

a=3b+22

3b+22+b=306

4b=284

b=71

a=306-71=235