prosze o zrobienie zadania 17 podpunkt b) i zadanie 19 całe (zadanie w załączniku)
z góry dzięki
zad.17
b)1/3x+1/4=1/4x-2/3/*12
12*1/3x+12*1/4=12*1/4x-12*2/3
4x+3=3x-8
4x-3x=-8-4
x=-11
zad. 19
a)3(x+1)=2x
3x+3=2x
3x-2x=-3
x=-3
c) 2(x+4)-6=3(x-2)+7
2x+8-6=3x-5+7x
2x-3x-7x=-5+6-8
-8x=-7/(-8)
x=7/8
b)5(z-2)=7(1-z)
5z-10=7-7z
5z-7z=7+10
12z=17/12
z=12/17=1 5/17
d)3(y+1)+6y=-2(y-1)=8
3y+3+6y=-2y+2+8
3y+6y+2y=10-3
11y=7/11
y=7/11
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zad.17
b)1/3x+1/4=1/4x-2/3/*12
12*1/3x+12*1/4=12*1/4x-12*2/3
4x+3=3x-8
4x-3x=-8-4
x=-11
zad. 19
a)3(x+1)=2x
3x+3=2x
3x-2x=-3
x=-3
c) 2(x+4)-6=3(x-2)+7
2x+8-6=3x-5+7x
2x-3x-7x=-5+6-8
-8x=-7/(-8)
x=7/8
b)5(z-2)=7(1-z)
5z-10=7-7z
5z-7z=7+10
12z=17/12
z=12/17=1 5/17
d)3(y+1)+6y=-2(y-1)=8
3y+3+6y=-2y+2+8
3y+6y+2y=10-3
11y=7/11
y=7/11