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Solve 12=w- {-7}

a) 5
b) 12
c) 19
d) -5

User Kyle Morse
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1 Answer

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Final answer:

To solve the equation, 12 = w - {-7}, we convert -{-7} to +7 and then subtract 7 from both sides to isolate w, yielding the answer w = 5.

Step-by-step explanation:

To solve the equation 12 = w - {-7}, we must isolate the variable w. First, we need to understand the notation -{-7} which is the negation of -7, thus it becomes positive 7.

The equation then simplifies to 12 = w + 7. To find the value of w, we subtract 7 from both sides of the equation.

w = 12 - 7

w = 5

To solve the equation 12 = w - (-7), we need to simplify the expression on the right side of the equation first. When we subtract a negative number, it is the same as adding the positive version of that number. So, -(-7) becomes +7.

Now we have 12 = w + 7. To isolate w, we need to subtract 7 from both sides of the equation.

12 - 7 = w

5 = w

Therefore, 12 will be equal to 5 plus -7, and the correct answer for the value of w is 5 which corresponds to option a.

User Shafiq Jetha
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