Question

thrice a number decreased by 15 gives 60 . find the number. ​

Answer 1

Answer:

anser is 5

Step-by-step explanation:

3(x-15)=60

(x-15)=60/3

x-15=20

x=20-15=5

Answer 2

${\underline {\underline {\Large {\bf \gray { Required \: Solution: } }}}}$

Given:

• Thrice a number decreased by 15 gives 60.

To find:

• The number.

Calculation:

Let the number be x.

|| According to the question :– ||

• ${\underline {\boxed {\large {\bf \gray {15 - 3x = 60 } }}}}$

$\sf { \longrightarrow -3x = 60 - 15 }$

$\sf { \longrightarrow -3x = 45}$

$\sf { \longrightarrow x = \cancel{\dfrac{45}{-3}} }$

$\sf \purple { \longrightarrow x = -15}$

Therefore, the number is -15.

Verification:

• ${\underline {\boxed {\large {\bf \gray {15 - 3x = 60 } }}}}$

Substitute the value of x :–

$\sf { \longrightarrow 15 - 3(-15) = 60 }$

$\sf { \longrightarrow 15 + 45 = 60 }$

$\sf { \longrightarrow 60 = 60 }$

LHS = RHS

Hence, verified!

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