1.

Thrice a number is equal to a number increased by 15.Find the number.​

Answer»

LET the unknown NUMBER be X .

Then, According to the question,

\huge \bf3x = x + 15 \\ \\ \leadsto \rm 3x - x = 15 \\ \leadsto \rm \: \: \: \: \: \: \: \: 2x = 15 \\ \leadsto \rm\: \: \: \: \: \: \: \: \: \: x = \frac{15}{2} \: \: \: \: = \frak{\red{7.5}}


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