Question

How to solve this 2x+x-4y

Answer 1

Answer:

$3x-4y$

Step-by-step explanation:

$2x+x-4y$

If a term doesn't have a coefficient , it is considered that the coefficient is 1

$2x+1x-4y$

Why is it considered that the coefficient is 1?

Remember that any term multiplied by 1 remains the same:

$1.x=x$

Step 1

The equality can be read in the other way as well , so any term can be written as a product of 1 and itself:

$x=1 . X$

Step 2

Usually, we don't need to write multiplication sign between the coefficient and the variable , so the simpler form is:

$x=1x$

That is why we can write the term without the coefficient as a term with coefficient 1.

Let's go back to your problem now

Collect like terms by adding their coefficients

$(2+1)x-4y$

Add the numbers

$3x-4y$

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Answer 2

Answer:

Combine like terms

2 + − 4

3x − 4y