Question

solve by substitution method 5x+y=17 and 9x-5y=17​

Answer 1

Answer:

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Step-by-step explanation:

5x+y=17------1eq

9x-5y =17-------2eq

y=17-5x-------3eq

$9x + 5y = 17 \\ 9x + 5(17 - 5x) = 17 \\ 9x + 85 - 25x = 17 \\ - 16x + 85 = 17 \\ - 16x = 17 - 85 \\ - 16x = - 68 \\ x = \frac{68}{16} \\ x = \frac{17}{4}$

now put value of x in eq--1

$9x - 5y = 17 \\ 9( \frac{17}{4} ) - 5y = 17 \\ \frac{153}{5} - 5y = 17 \\ \frac{153 - 25y}{5} = 17 \\ 153 - 25y = 85 \\ - 25y = 85 - 153 \\ y = \frac{68}{25} \\ y =$