SOLUTION: can you tell me how to solve this problum using the multiplication principle. and how do I preform a check -1/8x=-9/10 and get x to = something I just dont understand this at all.

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Question 415639: can you tell me how to solve this problum using the multiplication principle. and how do I preform a check -1/8x=-9/10 and get x to = something I just dont understand this at all.
Found 2 solutions by mananth, sheldonxu:
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
-1/8x=-9/10
here we have to make x the subject: meaning that x should be on one side and the constants on the other side.
if you mulyiply the equation by 8
%28-1%2F8%29+%2A+x+%2A+8+=+%28-9%2F10%29+%2A+8
we get
-x= (-9*4)/5
-x= -36/5
/-1
x= 36/5
CHECK
%28-1%2F8%29+%2A+%2836%2F5%29++=+%28-9%2F10%29+
+-9%2F10+=+-9%2F10

Answer by sheldonxu(4) About Me  (Show Source):
You can put this solution on YOUR website!
You can solve this by dividing -1/8 to each side of the equation:
x= (-9/10) / (-1/8 ) divide -1/8 to each side of the equation to make the coefficient of X become 1.
x= 36/5 when you divide a fraction, you actually multiply the reciprocal of the fraction. That is, (-9/10 )/(-1/8)=(-9/10)*(-8/1)=72/10=36/5.