Question

50x + 100y = 2000
_________Solve this problem

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Answer 1

x = 10

y = 15

Step-by-step explanation:

Given:

x + y = 25 ---(1)

50x + 100y = 2000 ---(2)

To Find:

The value of x and y

You Should know:

As you asked "how can we solve it by using substitution method".

1st You have to know Substitution Method,

Substitution method is just like it's name 1st solve any easy equation and take y alone or x alone.

2nd Plug in the value of x or y in unsolved equation. 3rd Simplify till answer and vice versa.

Solution:

Solving (1)

x + y = 25

or, x = 25 - y

Now, Plugin the value of x in equn. (2)

50x + 100y = 200

or,50(x + 2y) = 2000

or, x + 2y = 40

or, 25 - y + 2y = 40

or, y = 40 - 25

or, y = 15

So, x = 25 - y

= 25 - 15

= 10

Therefore, The required value of x = 10 and y = 15

Answer 2

madhushree i have given you my introduction in one of your other question