Question

ecuaciones
2x+3y=1
x+y=2

Answer 1

2x + 3y = 1
x + y = 2 despejando x⇒  x = 2 -y
sustituyendo
2 (2-y) + 3y = 1
4 - 2y  + 3y = 1
4 + y = 1
y = -3 
luego
x = 2 - (-3) = 2 + 3 = 5