Question

$x - y = 5 \\ 3x + 2y = 25$
substitute x and y​

Answer 1

Answer:

$x - y = 5 \: \: \: \: \: \: \: \: \: \: \:( 1) \\ \\ 3x + 2y = 25 \: \: \: \: \: \: \: \: (2) \\ \\ now \: from \: equation \: (1) \\ \\ x = 5 + y \: \: \: \: \: \: \: \: \: \: (3)\\ \\ put \: value \: of \: x \\ \: in \: equation \: (2) \\ \\ 3(5 + y) + 2y = 25 \\ \\ 15 + 3y + 2y = 25 \\ \\ 20y = 25 \\ \\ y = \frac{25}{20} \\ \\ y = \frac{5}{4} \\ \\ now \: put \: value \: of \: y \\ \: in \: equation \: (3) \\ \\ x = 5 + y \\ \\ x = 5 + \frac{5}{4} \\ \\ x = \frac{20 + 5}{4} \\ \\ x = \frac{25}{4}$

Answer 2

Answer:

x-y=5/3x+2y=25

so in first eq.. multiply by 3 then

3x-3y=15/3x+2y =25

then 3x divided by 3x cancel

5y= 25

so

y=25/5

it's give

y=5