Answer:
x = 0
Step-by-step explanation:
Given
- 3(5x - 7) = - 4x + 3(3x + 7) ← distribute parenthesis on both sides
- 15x + 21 = - 4x + 9x + 21 , that is
- 15x + 21 = 5x + 21 ( subtract 5x from both sides )
- 20x + 21 = 21 ( subtract 21 from both sides )
- 20x = 0 , thus
x = 0
