Question

Which of the following is a linear equation in one variable?
$(a) \: 2x +3y = 6$
$(b) \: 2x < 6$
$(c) \: 3 + 4 = 5$
$(d) \: 3x + 4 = 7$
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Answer 1

Answer:

D

Step-by-step explanation:

one variable means only one quantity is not distinguished and can vary. An equation must have an "equal to" symbol. Hence D is correct