Afla valoarea lui "a" daca:
a + 29 = b
b : 4 = c
c x 5 = d
d - 30 = 15
Rezolvare:
d - 30 = 15
d = 15 + 30
d = 45
c x 5 = d
c x 5 = 45
c = 45 : 5
c = 9
b : 4 = c
b : 4 = 9
b = 9 x 4
b = 36
a + 29 = b
a + 29 = 36
a = 36 - 29
a = 7
a + 29 = b
b : 4 = c
c x 5 = d
d - 30 = 15
Rezolvare:
d - 30 = 15
d = 15 + 30
d = 45
c x 5 = d
c x 5 = 45
c = 45 : 5
c = 9
b : 4 = c
b : 4 = 9
b = 9 x 4
b = 36
a + 29 = b
a + 29 = 36
a = 36 - 29
a = 7
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