Rozwiąż równania:
a) x+ 7= 20
b) 2(x+4)=10
c) 4(x-5)=25
d) 6(x+3)=24
e) 7x+17=7x+3
f) 5x+10=4x+12
g 4x+2 =10
2
h)6x-5=3x+4
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a)
x+ 7= 20
x = 20-7
x=13
b)
2(x+4)=10
2x + 8 = 10
2x = 10-8
2x = 2 /:2
x = 2
c)
4(x-5)=25
4x – 20 = 25
4x = 25 + 20
4x = 45 /:4
x= 45/4
x = 11 i 1/4
d)
6(x+3)=24
6x + 18 = 24
6x = 24-18
6x = 6 /:6
x = 1
e)
7x+17=7x+3
7x -7x = 3-17
0 = -13
sprzeczne
f)
5x+10=4x+12
5x -4x = 12 -10
x = 2
g
(4x+2)/2 =10 /*2
4x+2 = 20
4x = 20 -2
4x = 18 /:4
x = 18/4
x = 4 i 2/4
x = 4 i 1/2
h)
6x-5=3x+4
6x -3x = 4 +5
3x = 9 /:3
x =3
a) x+ 7= 20
x= 13
b) 2(x+4)=10
2x+8=10
2x=2
x=1
c) 4(x-5)=25
4x-20=25
4x=65
x= 65/4= 16 1/4
d) 6(x+3)=24
6x+18=24
6x=6
x=1
e) 7x+17=7x+3
0=-14
równanie sprzeczne
f) 5x+10=4x+12
x=2
g)
(4x+2) / 2 =10
2x+1 =10
2x=9
x=4,5
h)
6x-5=3x+4
3x=9
x=3