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which ordered pair is a solution to the system of linear equations 1/2 x -3/4y = 11/60 and 2/5x+1/6y=3/10?​

User Nelstaar
by
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1 Answer

4 votes

Answer:

x = 2/3

y = 1/5

Explanation:

1/2 x -3/4y = 11/60 equation 1

2/5x+1/6y=3/10 equation 2

multiply equation 1 by 60

60(1/2x -3/4y = 11/60)

30x - 45y = 11 equation 3

multiply equation 2 by 30

30(2/5x+1/6y=3/10)

12x + 5y = 9 equation 4

multiply equation 4 by 9

9(12x + 5y = 9)

108x + 45 = 81 equation 5

add equation 3 and equation 5

30x - 45y = 11

108x + 45 = 81

___________

138x = 92

x = 2/3

Substitute x = 2/3 to any of the equations to find the value of y. i choose equation 4

12x + 5y = 9

12(2/3) + 5y = 9

8 + 5y = 9

5y = 1

y = 1/5

User Tu Hoang
by
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