Simplify by combining like terms

2/8x + 3/10y -5/8x + 4/10y

(-3/8)x + (7/10)y

To simplify the expression 2/8x + 3/10y - 5/8x + 4/10y, we need to combine like terms. Like terms are terms that have the same variables raised to the same powers.

Let's start by combining the x terms: 2/8x - 5/8x. Since these terms have the same variable x and the same denominator 8, we can subtract their coefficients: (2 - 5)/8x = -3/8x.

Next, let's combine the y terms: 3/10y + 4/10y. Since these terms have the same variable y and the same denominator 10, we can add their coefficients: (3 + 4)/10y = 7/10y.

Now our expression becomes:

-3/8x + 7/10y

To simplify the given expression, we need to combine the like terms. Like terms are terms that have the same variable and exponent.

Let's break down the given expression:

2/8x + 3/10y - 5/8x + 4/10y

First, we can combine the terms with the variable x:

2/8x - 5/8x = (2-5)/8x = -3/8x

Next, we can combine the terms with the variable y:

3/10y + 4/10y = (3+4)/10y = 7/10y

Now, we have simplified the expression to:

-3/8x + 7/10y

Therefore, the simplified form of the given expression is -3/8x + 7/10y.