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Option (d)
Explanation:
Solution :-
I)
Given equation is x²-4x+3 = 0
It is not a linear equation .
It is a quadratic equation
Since it's degree is 2
II)
Given that 6x-2√y = 7
It is not a linear equation in one variable
Because there are two variables x and y
III)
Given that
3x-1 = -2x
=> 3x+2x-1 = 0
=> 5x-1=0
It is a linear equation in one variable x
IV)
Given that
3x+2 = 4(x+7)+9
=> 3x+2 = 4x+28+9
=> 3x+2 = 4x+37
=> 4x+37-3x-2 = 0
=> x+35 = 0
It is a linear equation in one variable x
Answer:-
III and IV are the linear equations in one variable.
Used formulae:-
→An equation of the degree 1 is called a linear equation.
→An equation of the degree 1 with only one variable is called a linear equation in one variable.
→ The standard k linear equation in one variable is ax+b = 0
Where, a and b are real numbers and x is the variable.