rozwiąż równania
a) 4x - 3 = 3x + 5
b) 5x +2 = 7 - 3x
c) 3(x - 1) = 0
d) -6(x+1) = 24
e) -7(x - 2) = 3x - 1
f) 4(x - 1) = 6(1 + x)
plus sprawdzenia ze np.L=
P=
ok ~!
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a) 4x - 3 = 3x + 5
x =5+3
x=8
spr.
4 × 8 - 3 = 3 × 8 + 5
29 = 29
L = P
b) 5x +2=7-3x
8x=7-2
8x=5/:8
x = 5/8
spr.
5 × 5/8 + 2 = 7 - 3 × 5/8
7 5/8 = 4 5/8
L nie rowna sie P
c) 3(x-1)=0
3x-3=0
3x=3/:3
x=1
spr:
3(1-1)=0
3-3=0
0=0
L=P
d) -6(x+1) = 24
-6x - 6 = 24
-6x = 30 / : (-6)
x = -5
spr.
-6(-5+1)=24
30-6=24
24=24
L=P
e) -7(x-2)=3x-1
-7x+14=3x-1
-7x-3x=-1-14
-10x=-15/:(-10)
x= 1,5
spr.
-7(1,5-2)=3 × 1,5 -1
-10,5 + 14 = 4,5 - 1
3,5 = 3,5
L=P
f) 4(x-1) = 6(1+x)
4x - 4 = 6 + 6x
-2x = 10 / :(-2)
x= -5
spr:
4 (-5 - 1) = 6 (1 + (-5))
-20 - 4 = 6 - 30 =
-24 = -24
L=P
Nie jestem pewien b i e reszta jest dobrze