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4. Linear Equation In One Variable
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Q40 of 113 Page 110

State whether the statements are true (T) or false (F).

In the equation 3x-3 = 9, transposing -3 to RHS, we get 3x = 9.

False

given equation is,


⇒ 3x-3 = 9


⇒ Transposing – 3 to RHS


⇒ 3x = 9 + 3


⇒ 3x = 12


⇒ x = 4


⇒ We get 3x = 12 on transposing – 3 to RHS.


⇒ Hence, it is not true.


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38

State whether the statements are true (T) or false (F).

A and B are together 90 years old. Five years ago A was thrice as old as B was. Hence, the ages of A and B five years back would be (x-5) years and (85-x) years respectively.

39

State whether the statements are true (T) or false (F).

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41

State whether the statements are true (T) or false (F).

In the equation 2x = 4 – x, transposing – x to LHS, we get x = 4.

42

State whether the statements are true (T) or false (F).

If -7x = 9, then 7x = 9 +

Questions · 113
4. Linear Equation In One Variable
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