Combine like terms: Combine the like terms, which are the terms with the variable z. z - 11 + z - 15 = z + z - 11 - 15Add coefficients of z: Add the coefficients of the z terms together. z + z = 2zCombine constant terms: Combine the constant terms -11 and -15. -11 - 15 = -26Write final expression: Now, write the combined terms together to get the final expression. 2z - 26

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$z-11\quad z-15$

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Algebra 1

Solve linear equations: mixed review

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z-11\quad z-15

Combine like terms: Combine the like terms, which are the terms with the variable $z$ . $z - 11 + z - 15 = z + z - 11 - 15$
Add coefficients of $z$ : Add the coefficients of the $z$ terms together. $z + z = 2z$
Combine constant terms: Combine the constant terms $-11$ and $-15$ . $-11 - 15 = -26$
Write final expression: Now, write the combined terms together to get the final expression. $2z - 26$