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Sagot :
18 - (-f) = 91
Subtracting a negative value changes to addition:
18 + f = 91
Subtract 18 from both sides:
F = 73
Answer:
f = 73
Step-by-step explanation:
Solve for f
18 - ( - f ) = 91
- Remove the parantheses and change their sign.
18 + f = 91
- subtract each side by 18
18 - 18 + f = 91 - 18
- calculate
f = 73
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