Question

twice a number when decreased by 7 gives 45.find the number

Answer 1

let the number= x

given: 2x+7 = 45

2x= 45-7

2x = 38

x= 19

the required number is 19

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Answer 2

✬ $\large\blue{\texttt{Number = 26}}$ ✬

Step-by-step explanation:

Given:

• Twice a number decreased by 7 gives 45.

To Find:

• What is the number ?

Solution: Let the number be x. Then,

➙ Twice of number = 2x

After decreasing 7 the number gives us 45.

$\large\implies\orange{\texttt {2x – 7 = 45}}$

$\large\implies\orange{\texttt {2x = 45 + 7}}$

$\large\implies\orange{\texttt {2x = 52}}$

$\large\implies\orange{\texttt {x = 52/2}}$

$\large\implies\orange{\texttt {x = 26}}$

Hence, the number is x = 26

_________________

★ Verification ★

➟ $\large\bold{\texttt {2x – 7 = 45}}$

➟ $\large\bold{\texttt {2(26) – 7 = 45 }}$

➟ $\large\bold{\texttt {52 – 7 = 45}}$

➟ $\large\bold{\texttt {45 = 45}}$

$\large\boxed{\texttt{Verified}}$