" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
5=7x-8x
5=-x / : (-1)
x=-5
SPRAWDZENIE
8*(-5)+5= =35
7*(-5)=-35 L=P
B)
7n + 2 = 6n - 3
7n-6n=-3-2
n=-5
SPRAWDZENIE
7*(-5)+2=-33
6*(-5)-3=-33 L=P
C) x - 25 = 2x - 2
-25+2=2x-x
-23=x
SPRAWDZENIE
-23-25=-48
2*(-23)-2=-48 L=P
E) 8k - 19 = -8k + 13
8k+8k=13+19
16k=32 /: 16
k=2
SPRAWDZNIE
8*2-19=-3
-8*2+13= -3 L=P
F) -s + 16 = 4s - 14
-s-4s=-14-16
-5s=-30 /:(-5)
s=6
SPRAWDZENIE
-6+16=10
4*6-14= 10 L=P