Question

Find the value of each expression using the given values.
(i) 2x - y + 3z, if x = 4, y = 7 and z = 2 ​

Answer 1

Answer:

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Answer 2

Answer :

The required number is 7.

Step-by-step explanation :

Given that,

x = 4 ; y = 7 and z = 2, Find the value of 2x - y + 3z

Solution :

⟹ 2x - y + 3z

By putting the values, one by one

⟹ 2*4 - y + 3z

⟹ 2*4 - 7 + 3z

⟹ 2*4 - 7 + 3*2

⟹ 8 - 7 + 6

⟹ 1 + 6

⟹ 7

Hence, the required number is 7.

Now, Verification

x = 4, y = 7 and z = 2

⟹ 2x - y + 3z = 7

By putting the values,

⟹ 2*4 - y + 3z = 7

⟹ 2*4 - 7 + 3z = 7

⟹ 2*4 - 7 + 3*2 = 7

⟹ 8 - 7 + 6 = 7

⟹ 1 + 6 = 7

⟹ 7 = 7

L.H.S = R.H.S

Hence, Verified !