Answer:
10x + 12y
Explanation:
To simplify 3(2x + 5y) - (-4x + 3y), we can start by removing the parentheses using the distributive property.
3(2x + 5y) - (-4x + 3y)
= 6x + 15y - (-4x + 3y)
Next, we can simplify the double negative by changing the signs inside the parentheses.
= 6x + 15y + 4x - 3y
Now, we can combine like terms.
= (6x + 4x) + (15y - 3y)
= 10x + 12y
Therefore, the simplified expression is 10x + 12y.