ա)2a + C + a + 5b = 3a + 8b

3a + 5b + C = 3a + 8b

C = 8b — 5b = 3b

2a + 3b + a + 5b = 3a + 8b

բ)3x + C + y + D = 11x + 5y

C = 11x — 3x = 8x

D = 5y — y = 4y

3x + 8x + y + 4y = 11x + 5y

գ) C — 2a + 3b — D = 10a — 4b

C = 10a — 2a = 8a

D = 4b — 3b = 1b

8a — 2a + 3b — 1b = 10a — 4b

դ)C + D + x = 25x + 17y

C = 25x — x = 14x

D = 17y

14x + 17y + x = 25x + 17y