Question

If = 5 , = 2 is a solution of the linear equation

(a) + 2 = 7 (b) 5 + 2 = 7 (c) + = 7 (d) 5 + = 7​

Answer 1

Answer:

x+y =7

Step-by-step explanation:

The solution should satisfy the appropriate equation.

So, let us investigate each option by substituting x=5 & y=2

Option A, x+2y=7.

L.H.S. =5+2×2=9

= R.H.S.

∴ It is not the appropriate equation.

Option B, 5x+2y=7

L.H.S. =5×5+2×2=29

= R.H.S.

∴ It is not the appropriate equation.

Option C, x+y=7⇒ L.H.S. =5+2=7= R.H.S

∴ It is the appropriate equation.

Option D, 5x+y=7⇒ L.H.S. =5×5+2=27

= R.H.S.

∴ It is not the appropriate equation.

Hence, option C is correct.

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