Question

simplyfy (7x-4y)-(-2x-y)​

Answer 1

Step-by-step explanation:

(7x-4y)-(-2x-y)

(7x-4y)+2x+y

7x+2x-4y+y

9x-3y

Answer 2

$\huge\tt{\bold{\underline{\underline{Question᎓}}}}$

simplify (7x-4y)-(-2x-y)

$\huge\tt{\bold{\underline{\underline{Answer᎓}}}}$

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$= > 7x - 4y - ( - 2x - y)$

$\huge\mathcal{Rules}$

• $\bold{+\:-\:=\:-}$
• $\bold{-\:-\:=add \:but \:signs\: of \:-}$

$= > 7x - 4y + 2x + y$

$= > 9x - 3y$

=>Here ,we see that 9x and -3y are two different terms having degree 1 but constant along with variable;e.g->9 with x & 3 with y are a multiple of 3.so,we take 3 as a common.

$= > 3(3x - y)$

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