Question

3x-5y=6
x+5y=7
Find the value of x and y by substitution method

Answer 1

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Answer 2

Answer:

x = 13/4

y = 3/4

Step-by-step explanation:

x + 5y = 7

x = 7 - 5y ------ equation 1

3x - 5y = 6 ------ equation 2

Substitute equation 1 in 2.

3(7 - 5y) - 5y = 6

21 - 15y - 5y = 6

21 - 20y = 6

- 20y = 6 - 21

- 20y = - 15

y = 3/4

Substitute y = 3/4 in equation 1

x = 7 - 5(3/4)

x = 7 - 15/4

x = 13/4

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