Question

7x + (5y-4), (3-X), 2 x ²5 y2​

Answer 1

Answer:

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❥By taking LCM ,

These is a problem of linear equations.

The problems of can be solved by two different methods…

• Elemination

• Substitution

Here we will discuss about the elemination techniques.

As the name suggest that we need to eleminate the variables (either x or y) to get the answer. Let's understand with the help of an example.

Given equation

$3x + 5y = 9$

5x + 3y = 7

To achieve this ,

we will multiply 5 with equation 1

And multiply 3 with equation 2

On multiplication it will look like….

$15x + 25y = 45$

$15x + 9y = 21$

$16y = 24$

$y = 1.5$

Now, we will put y = 1.5 in equation 1 and solve

Upon solving we get,

$x = 0.5$

Now, we got both x and y.

So, $x + y = 0.5 + 1.5 = 2$

Answer 2

Answer:

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