Question

By substitution method find the value of x and y if 3x+4y=6 x-y=7

Answer 1

Answer: x = -15 / 7

Step-by-step explanation:

3x + 4y = 6 (1)

x - y = 7

x = 7 + y

Substituting the value of x in (1), we get

3(7+y) + 4y = 6

21 + 3y + 4y = 6

21 + 7y = 6

7y = -15

y = -15/7

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