Question

73 x + 27 y is equal to 1927 x + 73 y is equal to minus 19 use subtraction and addition method

Answer 1

Step-by-step explanation:

73x+27y = 19 ; 27x+73y = -19

73x+27y = 19...1

27x+73y = -19...2

lets add (1) & (2)

73x+27y = 19

+

27x+73y = -19

100x+100y= 0

100(x+y) = 0

x+y = 0...3

lets substract 2 from 1

73x+27y = 19

-

27x-73y = +19

46x - 46y =38

46(x-y) = 38

x-y = 38/46

x-y = 19/23...4

lets add (3)&(4)

x+y = 0

+

x-y = 19/23

2x = 19/23

x = 19/46

put value of 'x' in equation 4

x-y = 19/23

19/46 - y = 19/23

19/46 - 19/23 = y

19/46-38/46 = y

-19/46 = y

(x,y) = (19/46,-19/46)