Question

9. x + y + z-(2x + y - z) =​

Answer 1

$\large\sf\underline{Given:}$

• $\sf\:x+y+z-(2x+y-z)$

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$\large\sf\underline{Solution:}$

$\sf\:x+y+z-(2x+y-z)$

• Opening the brackets

$\sf\to\:x+y+z-2x-y+z$

• Pairing like terms together

$\sf\to\:x-2x+y-y+z+z$

$\sf\to\:-x+y-y+z+z$

$\sf\to\:-x+\cancel{y}-\cancel{y}+z+z$

$\sf\to\:-x+z+z$‎

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$\large{\underline{\boxed{\mathrm\pink{\to\:-x+2z}}}}$

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⠀‎⠀$\dag\:\underline{\sf Things\:to\:remember\::}$

• $\sf\:- \times - = +$

• $\sf\:- \times + = -$

• $\sf\:+ \times + = +$

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!! Hope it helps !!