Odpowiedzi

2010-03-05T10:37:06+01:00
A)
5x+3=a
5 * 10 + 3 = a
a = 53

b)
2x-4=x+a
2 * 10 - 4 = 10 + a
a = 16 - 10
a = 6

c)
3-4x=a-5
3 - 4 * 10 = a - 5
3 - 40 + 5 = a
a = -32

d)
2(x+1)+x=a
2 (10 + 1) + 10 = a
a = 22 + 10
a = 32
20 4 20