Question

Solve the following system of equations. 3x + 2y - 5 = 0 x = y + 10

Answer 1

I would say the answer is 5/2

Answer 2

Solving by the substitution method:

2y - 5 = 0
x = y + 10

2y = 5
y = x - 10

-> 2 (x-10) = 5
-> 2x -20 = 5
-> 2x = 20 + 5
-> 2x = 25

-> x = 25/2

Or
-> x = 12.5

y = x - 10
-> y = 12,5 - 10
-> y = 2.5

Or
-> y = 25/2 - 10/1
-> y = 25/2 - 10/1 x(2)
-> y = (25 - 20)/2
-> y = 5/2

Answer: X = 25/2, Y = 5/2
or X = 12.5, Y = 2.5 .