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ICSE Class 6 Answered

Which of the following are linear equation? (a)15-6=9         (b)2x+5=7   (C)xy+4=1         (d) 4+y=9
Asked by umeshyadav1980.uy | 18 Sep, 2018, 08:24: PM
answered-by-expert Expert Answer

A linear equation in one variable can be written in the form ax +b = c , where a, b, and c are real numbers.

a. 15-6=9
It is not a linear equation, as it doesn't contain a variable with degree 1.
 
b. 2x+5=7 
It is a linear equation , as it is in the form of ax +b = c .
 
c. xy+4=1
It is not a linear equation, as it doesn't contain a variable with degree 1.
Since  degree of x is 1 and degree of y is 1 = degree of xy is 1 + 1 =2
 
d. 4+y=9
y + 4 = 9 

It is a linear equation , as it is in the form of ax +b = c .
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