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What is negative 7 over 13 subract 3 over 13 - ADVANTAGE Calculator

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If you mean (-7/13) - (3/13) this is -10/13 (negative 10 over 13).
If you mean -[(7/13) - (3/13)] this is -4/13 (negative 4 over 13).

Posted on Dec 02, 2014


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I want to put 4 batteries together 4x 12v 7AH. and how many volts and AH would that be.

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Solve for x and y: 0.2x+0.7y=1.5 0.3x-0.2y=1

Ok so first you need to find what x equals in terms of y. so use the first equation .2x+.7y=1.5 solve for x by the following steps
subract .7y from both sides: .2x= 1.5-.7y --->
divide by .2 on both sides: x= 7.5 - 3.5y. --->
Now plug in x= 7.5 - 3.5y for x in the second equation 0.3 (7.5 - 3.5y) -0.2y=1 --->
Distribute the .3: 2.25 - 1.05y -.2y = 1--->
solve for y by combining like terms (the y's) and subtractive 2.25: -1.25y = -1.25--->
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Now go back to your x= 7.5 - 3.5y you solved for. Plug in 1 for y in the equation and solve for x--->
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5/12-3/4 subracting fraction with different denominator


Welcome to Fixya. The solution is written below.

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