Help? x - 6y= 64
7y - 4x= -84
I think one reason I'm having problems with it is every time I work it out,I get fractions and I'm not sure how to figure it.
And also : 0.1x + 0.5y= -2.4
0.4x - 0.2y= 3.6 Help very appreciated!
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Originally Posted by Ai Ekio Help?
x - 6y= 64 ... x = 6y + 64 ... sub into the second equation for x
7y - 4x= -84 ... 7y - 4(6y + 64) = -84 ... solve for y
0.1x + 0.5y= -2.4 ... multiply every term in both equations by 10 to clear the decimals, isolate x in the 1st equation, sub the result into the 2nd equation. same drill.
0.4x - 0.2y= 3.6 ...
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