Handsome22
Handsome22 Handsome22
  • 18-04-2018
  • Mathematics
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choixongdong
choixongdong choixongdong
  • 18-04-2018
multiply equation A by 6 and equation B by 4

A: 60x - 24y = 120
B: 32x + 24y =  56
-------------------------- (A + B) --- add these two equations 

92x = 176
    x = 176/92
    x = 44/23

substitute x = 44/23 into equation B
8(44/23) + 6y = 14
352 / 23 + 6y = 14
6y = 14 - 352/23
6y = -30/23
  y = -5/23

answer
x = 44/23 and y = -5/23



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