Răspuns :
x + 3 a - 15b = x + 3 (a - 5b) = 29
Deci
x + 3 * 7 = 29
x + 21 = 29
x = 8 (dupa corectie)
a - 5 b = 7
x + 3 a - 15 b = 29
x + 3 ( a - 5 b ) = 29
x + 3 × 7 = 29
x + 21 = 29
x = 29 - 21
x = 8
x + 3 a - 15b = x + 3 (a - 5b) = 29
Deci
x + 3 * 7 = 29
x + 21 = 29
x = 8 (dupa corectie)
a - 5 b = 7
x + 3 a - 15 b = 29
x + 3 ( a - 5 b ) = 29
x + 3 × 7 = 29
x + 21 = 29
x = 29 - 21
x = 8