Question

Solve 3c + 4 = -4c - 17 A. 3 B. -3 C. 21 D. -21

Answer 1

3c + 4 = -4c - 17

3c = -4c - 17 - 4           Subtracted 4 from both sides

3c + 4c = -21               Added 4c to both sides. (-17 - 4 = -21)

7c = -21                       Combined like terms (4c + 3c = 7c)

c = -3                            Divided 7 both sides