Question

simplify the number 6x+(-7x-2y)

Answer 1

$6x - 7x - 2y = 0 \\ - x - 2y = 0 \\ or \: - (x + 2y) = 0 \\ x + 2y$
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Answer 2

6x-7x-2y

-x-2y

-x=2y

let the value of x=1

-1=2y
-1/2=y

putting the value of y

-x=2×-1/2
-x=-1
x=1

hope it will help