Respuesta :
A more detailed solution:
X - 2/7 = 5/7
=>Add 2/7 to both sides to isolate X
X - 2/7 + 2/7 = 5/7 + 2/7
=> Simplify
X + 0 = (5+2)/7
=> Simplify again
X = 7/7
=> Simplify one last time
X = 1
X - 2/7 = 5/7
=>Add 2/7 to both sides to isolate X
X - 2/7 + 2/7 = 5/7 + 2/7
=> Simplify
X + 0 = (5+2)/7
=> Simplify again
X = 7/7
=> Simplify one last time
X = 1