Answer:
–7.5 = x
Explanation:
22 = x – 3x + 7
Subtract 7 from both sides:
22 – 7 = x – 3x + 7 – 7
15 = x – 3x
15 = –2x
Divide by –2 on both sides:
15 ÷ –2 = –2x ÷ –2
–7.5 = x
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Let n be the 40%, and 100-n be the 10%. Then:
.4n+.1(100-n)=.22(100)
.3n+10=22
.3n=12
n=40
The candy distributor needs 40kg of 40%, and 60kg of 10%
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Answer: A) -9
Step-by-step explanation:
If x = -2
Then
= 
So, it is -9