Question

00. If the cost of 37 pens and 53 pencils together is 320, while 53 pens
and 37 pencils together cost 400. The cost of two pens is:
​

Answer 1

$\Large{\textbf{\underline{\underline{According\:to\:the\:Question}}}}$

Given,

${\boxed{\bigstar{{Cost\;of\;37\;pen\;53\;pencil}}}}$

= 320

Hence,

37 + 53 = 320 ..... (1)

Also,

${\boxed{\bigstar{{Cost\;of\;37\;pencil\;and\;53\;pens }}}}$

= 400

Hence

53 + 37 = 400 ....... (2)

${\boxed{\bigstar{{Solving\;Equation\;mutiply\;by\;53 }}}}$

1961 + 2809 = 16960 .... (3)

Also,

Now,

Multiply (2) × 37 we get :-

1961 + 1369 = 14800 ..... (4)

Now,

${\boxed{\bigstar{{Subtracting\;(3)\;and\;(4)\;we\;get :- }}}}$

1440 pencils = 2160

Hence,

$\tt{\rightarrow\dfrac{2160}{1330}}$

= 1.5

Hence,

One pencil = 1.5

${\boxed{\bigstar{{Hence,\;In\;equation\;(1)}}}}$

37 pens + 53(1.5) = 320

37 pens + 79.5 = 320

37 pens = 240.5

One pen = 6.5

Hence,

2 pens

= 6.5 × 2

= 13

Answer 2

Answer:

see the attached image