a)
2x + 9 = 15
2x = 15 - 9 = 6
x = 6/2 = 3
b)
4x - 7 = x + 5
4x - x = 5 + 7
3x = 12
x = 12/3 = 4
c)
2(x + 2) = x - 6
2x + 4 = x - 6
2x - x = - 6 - 4
x = - 10
Odpowiedź:
a)2x+9=15
2x= 15 - 9
2x= 6
x=3
b) 4x-7=x+5
4x-x = 5+7
3x=12
x= 4
c)2(x+2)=x-6
2x+4=x-6
2x-x=-6-4
x=-10
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a)
2x + 9 = 15
2x = 15 - 9 = 6
x = 6/2 = 3
b)
4x - 7 = x + 5
4x - x = 5 + 7
3x = 12
x = 12/3 = 4
c)
2(x + 2) = x - 6
2x + 4 = x - 6
2x - x = - 6 - 4
x = - 10
Odpowiedź:
a)2x+9=15
2x= 15 - 9
2x= 6
x=3
b) 4x-7=x+5
4x-x = 5+7
3x=12
x= 4
c)2(x+2)=x-6
2x+4=x-6
2x-x=-6-4
x=-10