rozwiąż równanie i sprawdź pliss a)8x+2=20 b)-4z+35=-z+5 c)25m-3=24m-4
a)
8x + 2=20
8x= 20-2
8x=18
x=18/8
x= 2.25
spr. 8 *2.25 +2 = 20
18 + 2 =20
20=20 Dobrze :D
b) -4z +35 = z+5
-4z -z = -35 +5
-5z=-30
z=-30/-5
z = 6
spr. -4 * 6 +35 = 6+5
-24+35 = 11
11=11 Dobrze :D
c) 25m -3=24m-4
25m - 24m = -4 +3
m = -1
spr. 25*-1 - 3 = 24*-1 -4
-25 -3 = -24 - 4
-28 = -28 Dobrze :D
8x+2=20
8x=20-2
8x=18 /:8
x=2,25
spr. 8*2,25+2=20
18+2=20
-4z+35=-z+5
35-5=-z+4z
30=3z
3z=30 / :3z
z=10
L = -4*10+35= -5
P=-10+5 = -5
L=P
25m-3=24m-4
25m-24m=-4+1
1m=-1 : 1
m= -1
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a)
8x + 2=20
8x= 20-2
8x=18
x=18/8
x= 2.25
spr. 8 *2.25 +2 = 20
18 + 2 =20
20=20 Dobrze :D
b) -4z +35 = z+5
-4z -z = -35 +5
-5z=-30
z=-30/-5
z = 6
spr. -4 * 6 +35 = 6+5
-24+35 = 11
11=11 Dobrze :D
c) 25m -3=24m-4
25m - 24m = -4 +3
m = -1
spr. 25*-1 - 3 = 24*-1 -4
-25 -3 = -24 - 4
-28 = -28 Dobrze :D
8x+2=20
8x=20-2
8x=18 /:8
x=2,25
spr. 8*2,25+2=20
18+2=20
-4z+35=-z+5
35-5=-z+4z
30=3z
3z=30 / :3z
z=10
L = -4*10+35= -5
P=-10+5 = -5
L=P
25m-3=24m-4
25m-24m=-4+1
1m=-1 : 1
m= -1