15-(12(divided by)2)+(-3x4)

15- (12divided by 2) + (-3x4)

Start with dividing and multiplying, so you get..
15- (6)+ (-12)
Then simplify.
-3

To simplify the expression 15 - (12/2) + (-3x4) step-by-step, follow the order of operations (also known as PEMDAS):

Step 1: Start with the parentheses.
15 - (12/2) + (-3x4)
= 15 - 6 + (-3x4)

Step 2: Evaluate the division within the parentheses.
= 15 - 6 + (-3x4)
= 15 - 6 + (-12)

Step 3: Multiply the numbers outside the parentheses.
= 15 - 6 + (-12)
= 15 - 6 - 12

Step 4: Perform subtraction from left to right.
= 9 - 12

Step 5: Subtract the numbers.
= -3

Therefore, 15 - (12/2) + (-3x4) simplifies to -3.

To solve this expression, let's break it down step by step:

Step 1: Divide 12 by 2:
12 divided by 2 equals 6.

Step 2: Multiply -3 by 4:
-3 multiplied by 4 equals -12.

Step 3: Substitute the values into the expression:
15 - 6 + (-12).

Step 4: Perform the addition/subtraction from left to right:
15 - 6 equals 9, then 9 + (-12) equals -3.

Therefore, the value of 15 - (12 divided by 2) + (-3 multiplied by 4) is -3.