Combine like terms: Combine like terms. We need to combine the terms with x's and the terms with y's. 4x - 7x = -3x (combining x terms) y - (-3y) = y + 3y = 4y (combining y terms and changing subtraction of a negative to addition)Combine constant terms: Combine the constant terms. There is only one constant term, which is -7, so it remains unchanged.Write simplified expression: Write the simplified expression. Now we combine the results from Step 1 and Step 2. The simplified expression is -3x + 4y - 7.

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( $20$ ) $4 x-7+y-7 x-(-3 y)$

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Algebra 2

Add, subtract, multiply, and divide polynomials

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4 x-7+y-7 x-(-3 y)

Combine like terms: Combine like terms. $\newline$ We need to combine the terms with $x$ 's and the terms with $y$ 's. $\newline$ $4x - 7x = -3x$ (combining $x$ terms) $\newline$ $y - (-3y) = y + 3y = 4y$ (combining $y$ terms and changing subtraction of a negative to addition)
Combine constant terms: Combine the constant terms. $\newline$ There is only one constant term, which is $-7$ , so it remains unchanged.
Write simplified expression: Write the simplified expression. $\newline$ Now we combine the results from Step $1$ and Step $2$ . $\newline$ The simplified expression is $-3x + 4y - 7$ .