a) x/2+x/3+x/4+x/6+x/12-2=x-4(1/2-x/12)
x/2+x/3+x/4+x/6+x/12-2=x-2+x/3 /*12
6x+4x+3x+2x+x-24=12x-24+4x
6x+4x+3x+2x+x-12x-4x=-24+24
0=0
b) 3[3(3x-4)-4]-7=-2[-2(-2x+5)+5]+5
3[9x-12-4]-7=-2[4x-10+5]+5
27x-36-12-7=-8x+20-10+5
27x+8x=20+5-10+36+12+7
35x=70 /:35
x=2
c) 4[4(4x+9)-9]+9=6[6(6x-2)+2]-4(38x+1)
4[16x+36-9]+9=6[36x-12+2]-152x-4
64x+144-36+9=216x-72+12-152x-4
64x-216x+152x=-72+12-4+36-144-9
0=-181 równanie sprzeczne
d) -2(2x+4)+4(4x+8)=2(8x+4)-4(x-4)
-4x-8+16x+32=16x+8-4x+16
-4x+16x-16x+4x=8+16+8-32
e) 2(x-3)/4-3(x+2)/5-x-1/2=1/4(8-5x)+7/20
2x-6/4-3x+6/5-x-1/2=2-5/4x+7/20 /*20
5(2x-6)-4(3x+6)-10(x-1)=40-25x+7
10x-30-12x-24-10x+10=40-25x+7
10x-12x-10+25x=40+7+30+24-10
13x=91 /:13
x=7
Myślę że pomogłam.. ;)
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a) x/2+x/3+x/4+x/6+x/12-2=x-4(1/2-x/12)
x/2+x/3+x/4+x/6+x/12-2=x-2+x/3 /*12
6x+4x+3x+2x+x-24=12x-24+4x
6x+4x+3x+2x+x-12x-4x=-24+24
0=0
b) 3[3(3x-4)-4]-7=-2[-2(-2x+5)+5]+5
3[9x-12-4]-7=-2[4x-10+5]+5
27x-36-12-7=-8x+20-10+5
27x+8x=20+5-10+36+12+7
35x=70 /:35
x=2
c) 4[4(4x+9)-9]+9=6[6(6x-2)+2]-4(38x+1)
4[16x+36-9]+9=6[36x-12+2]-152x-4
64x+144-36+9=216x-72+12-152x-4
64x-216x+152x=-72+12-4+36-144-9
0=-181 równanie sprzeczne
d) -2(2x+4)+4(4x+8)=2(8x+4)-4(x-4)
-4x-8+16x+32=16x+8-4x+16
-4x+16x-16x+4x=8+16+8-32
0=0
e) 2(x-3)/4-3(x+2)/5-x-1/2=1/4(8-5x)+7/20
2x-6/4-3x+6/5-x-1/2=2-5/4x+7/20 /*20
5(2x-6)-4(3x+6)-10(x-1)=40-25x+7
10x-30-12x-24-10x+10=40-25x+7
10x-12x-10+25x=40+7+30+24-10
13x=91 /:13
x=7
Myślę że pomogłam.. ;)