Table 2.

Types of Equations for Analysis

Type of Equation	Description	Operation	Form	Examples
Standard	operation-left-side	addition	a + b = c	4 + 6 = 10
	operation-left-side	subtraction	a − b = c	11 − 6 = 5
	operation-left-side	multiplication	a × b = c	7 × 6 = 42
	operation-left-side	division	a ÷ b = c	25 ÷ 5 = 5
	operation-left-side	mixed	a + b − c = d	(4 + 3) × 2 = 14
Nonstandard	operation-right-side	addition	c = a + b	10 = 4 + 6
	operation-right-side	subtraction	c = a − b	5 = 11 − 6
	operation-right-side	multiplication	c = a × b	42 = 7 × 6
	operation-right-side	division	c = a ÷ b	5 = 25 ÷ 5
	operation-right-side	mixed	d = (c ÷ b) × a	25 = (10 ÷ 2) × 5
	no-operation	none	a = a	4 = 4
	operations-both-sides	any combination of +, −, ×, ÷	a + b = c − d    a − b = c − d    a × b = c ÷ d	4 + 3 = 2 + 5    12 ÷ 3 = 2 × 2    9 − 3 = 24 ÷ 4