Rozwiąż równania i sprawdź swoje rozwiązania.
a) 7x- 23= 4x+ 2
b) 15z+ 24= - 5z- 5
c) 18- 8y= 5y- 9
d) - 4n+ 25= 25+ 3n
e) - 21- 3s= - 17- 12s
f) - 34+ 13x= - 13x- 34
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a) 7x-23=4x+2
7x-4x=2+23
3x=25 | :3
x=8 jedna trzecia
b) 15z+24= -5z-5
15z+5z=-5-24
20z=-29 | : 20
z=1,45
c) 18-8y= 5y-9
-8y-5y=-9-18
-13y=-27 |: (-13)
y= 2 i jedna trzynasta
d) -4n-3n= 25-25
n=0
e) -3s+12s=-17+21
9s= 4 | : 9
s=0,44
f) 13x+13x= -34+34
26x=0 |: 26
x=0
liczę na naj !!
a)7x-23=4x+2
7x-4x=2+23
3x=25/:3
x=8 1/3
spr.:
7*8 1/3 - 23=4*8 1/3 +2
7 * 25/3 - 23=4* 25/3 +2
175/3 - 23=100/3 +2
58 1/3-23=35 1/3
35 1/3=35 1/3
b)15z+24+5-5z-5
155z+5z=-5-24
20z=-29 /:20
z=-29/20
z=-1 9/20
spr.;
15*(-29/20)+24=-5*(29/20)-5
(-87/4)+24=29/4 -5
(-21 3/4)+24=7 1/4 -5
2 1/4=2 1/4
c)18-8y=5y-9
-8y-5y=-9-18
-13y=-27 /:(-13)
y=-27/-13
y=2 1/13
spr.:
18-8*2 1/13=5 *2 1/13 - 9
18-8*27/13=5*27/13 -9
18-16 8/13=10 5/13-9
1 5/13=1 5/13
d)-4n+25=25+3n
-4n-3n=25-25
-7n=0 /(-7)
n=0
spr.:
-4*0 +25=25 +3*0
0+25=25+0
25=25
e)-21-3s=-17-12s
-3s+12s=-17+21
9s=4 /:9
s=4/9
spr.:
-21-3* 4/9=-17- 12* 4/9
-21-4/3=-17 - 16/3
-22 1/3= -22 1/3