// Test equation number, and its interaction with equation
// block's alignment and text direction.

---
#set math.equation(numbering: "(1)")

$ a + b = c $

#show math.equation: set align(center)
$ a + b = c $
#show math.equation: set align(left)
$ a + b = c $
#show math.equation: set align(right)
$ a + b = c $

#set text(dir: rtl)
#show math.equation: set align(start)
$ a + b = c $
#show math.equation: set align(end)
$ a + b = c $

---
#set math.equation(numbering: "(1)", number-align: start)

$ a + b = c $

#show math.equation: set align(center)
$ a + b = c $
#show math.equation: set align(left)
$ a + b = c $
#show math.equation: set align(right)
$ a + b = c $

#set text(dir: rtl)
#show math.equation: set align(start)
$ a + b = c $
#show math.equation: set align(end)
$ a + b = c $

---
#set math.equation(numbering: "(1)", number-align: end)

$ a + b = c $

#show math.equation: set align(center)
$ a + b = c $
#show math.equation: set align(left)
$ a + b = c $
#show math.equation: set align(right)
$ a + b = c $

#set text(dir: rtl)
#show math.equation: set align(start)
$ a + b = c $
#show math.equation: set align(end)
$ a + b = c $

---
#set math.equation(numbering: "(1)", number-align: left)

$ a + b = c $

#show math.equation: set align(center)
$ a + b = c $
#show math.equation: set align(left)
$ a + b = c $
#show math.equation: set align(right)
$ a + b = c $

#set text(dir: rtl)
#show math.equation: set align(start)
$ a + b = c $
#show math.equation: set align(end)
$ a + b = c $

---
#set math.equation(numbering: "(1)", number-align: right)

$ a + b = c $

#show math.equation: set align(center)
$ a + b = c $
#show math.equation: set align(left)
$ a + b = c $
#show math.equation: set align(right)
$ a + b = c $

#set text(dir: rtl)
#show math.equation: set align(start)
$ a + b = c $
#show math.equation: set align(end)
$ a + b = c $

---
// Error: 52-58 expected `start`, `left`, `right`, or `end`, found center
#set math.equation(numbering: "(1)", number-align: center)