Rozwiąż równanie:
A)-2x+4=5x+25
b)-8z+5=-z-1
c)6-5x=2x-7
Temat lekcji-Rownanie stopnia pierwszego z jedna niewiadomą
A) -2x+4=5x+25 /+2x
4=7x+25 /-25
-21=7x /:7
-3=x
B) -8z+5=-z-1 /+8z
5=7z-1 /+1
6=7z /:7
=z
C) 6-5x=2x-7 /+5x
6=7x-7 /+7
13=7x /:7
=x
1=x
A) -2x+4=5x+25
-7x= 21/:(-7) x = -3
B) -8z+5=-z-1 -7z= -6 /:(-7)
z = 6/7
C) 6-5x= 2x-7
-7x= -13 /:(-7)
x = 13/7
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A) -2x+4=5x+25 /+2x
4=7x+25 /-25
-21=7x /:7
-3=x
B) -8z+5=-z-1 /+8z
5=7z-1 /+1
6=7z /:7
=z
C) 6-5x=2x-7 /+5x
6=7x-7 /+7
13=7x /:7
=x
1=x
A) -2x+4=5x+25
-7x= 21/:(-7)
x = -3
B) -8z+5=-z-1
-7z= -6 /:(-7)
z = 6/7
C) 6-5x= 2x-7
-7x= -13 /:(-7)
x = 13/7