Respuesta :
Answer:
x = 7
Step-by-step explanation:
3x - 42 = -6x + 21
3x + 6x = 21 + 42
9x = 63
Dividing both sides by 9
x = 63/9
x = 7
Answer:
x = 7
Step-by-step explanation:
3x - 42 = -6x + 21
3x + 6x = 21 + 42
9x = 63
Dividing both sides by 9
x = 63/9
x = 7