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helmyjosh
helmyjosh helmyjosh
  • 17-01-2016
  • Mathematics
Answered

solve each system by graphing

y=-4/9x-3

y=-7/5x-3

Verified Answer :

taskmasters
taskmasters taskmasters
  • 17-01-2016

y = -4/9x-3
y = -7/5x-3

-4/9x-3 = -7/5x-3
-4(5x-3) = -7(9x-3)
-20x + 12 = -63x + 21
-20x + 63x = 21 - 12
43x = 9
43x/43 = 9/43
x = 9/43

y = -4/9x-3
y = -4/9(9/43) - 3
y = -4/(81/43-3)
y = -4 / (81-129/43)
y = -4 / -48/43
y = -4 * 43/-48
y = -172/-48
y =  3 28/48 or 3 7/12 

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