Answer and Step-by-step explanation: it might be for the triangle it's a negative or positive number to make it balance out the scale so looking at the picture it is a positive or negative 30
Answer:
51x
Step-by-step explanation:
3x^3 - 7x + 3x^3 + 4x
27x - 7x + 27x + 4x
20x + 31x
Exact form: 8
Decimal form: 13.45434264......
Hoped I Helped
