Question

11.If x-z=3 and X+z=45, then M= _____​

Answer 1

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Given

x−z=3 ( equation (i))

x+z=45 (equation (ii))

Adding equations (i) and (ii), we get

2x = 48

⇒ x =24

Substituting in (ii), we get

24 + z = 45 ⇒z = 21

Using the equation, 3M=Z+2x, we get

3M = 21 + 2(24)

3M = 21+48

M = 69/3

M = 23 is correct answer