Question

solve the following by substitution method :- i) 3x -5y =19 , -7x + 3y = -1​

Answer 1

Step-by-step explanation:

$3x - 5y = 19 \times ( - 7) \\ - 7x + 3y = - 1 \times (3) \\ \: \: \: \: \: \: - 21x + 35y = - 133 \\ - 21x + 9y \: \: \: \: \: = - 3 \\ + \: \: \: \: \: \: - \: \: \: \: \: \: \: \: \: \: \: \: + \\ 35y - 9y = - 130 \\ or \: \: 26y = - 130 \\ or \: \: y = \frac{ - 130}{26} = - 5 \\ \\ 3x - 5 \times ( - 5) = 19 \\ or \: \: 3x = 19 - 25 \\ or \: \: x = \frac{ - 6}{3} = - 2 \\ hence \: \: \: x = - 2 \\ y = - 5$

Answer 2

Aryman omi.Please give me heart. this question is solved by substitution method