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Skyla Proctor
Mathematics
24 April, 15:00
Find the answer - 1=1/2a+9
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Susan Hernandez
24 April, 15:13
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-1=1/2a+9
move + 9 to the other side
sign changes from + 9 to - 9
-1-9=1/2a+9-9
-1-9 = 1/2a
-10 = 1/2a
Mutiply both sides by 2/1
(-10) (2/1) = 1/2a*2/1
Cross out 2 and 2, divide by 2 and becomes 1
Cross out 3 and 3, divide by 3 and becomes 1
1*1*a = a
a = - 20
Answer: a = - 20
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