How to solve this 2x+x-4y

Step-by-step explanation:

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

Why is it considered that the coefficient is 1?

Remember that any term multiplied by 1 remains the same:

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:

Step 2

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

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

Add the numbers

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chad should not have included the values (1, 2) and (3, 6) because that would mean he only had half a healing card.