Question

twice a number decreased by 7 gives 3 the number is​

Answer 1

Answer:

Let the number be x.

twice =2x

When it is decreased by 7 we get the following equation:

2x−7=45

⇒2x=45+7

⇒2x=52

⇒x= 2

52

∴x=26

The number is 26.

Answer 2

ⓛⓔⓣ ⓣⓗⓔ ⓝⓤⓜⓑⓔⓡ ⓑⓔ ⓧ.

ⓣⓦⓘⓒⓔ =2ⓧ

ⓦⓗⓔⓝ ⓘⓣ ⓘⓢ ⓓⓔⓒⓡⓔⓐⓢⓔⓓ ⓑⓨ 7 ⓦⓔ ⓖⓔⓣ ⓣⓗⓔ ⓕⓞⓛⓛⓞⓦⓘⓝⓖ ⓔⓠⓤⓐⓣⓘⓞⓝ:

2ⓧ−7=45

⇒2ⓧ=45+7

⇒2ⓧ=52

⇒ⓧ=

2

52

∴ⓧ=26

ⓣⓗⓔ ⓝⓤⓜⓑⓔⓡ ⓘⓢ 26.