Collecting like terms they are equal to: 2x+6y
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5+y+2y? = 5+3y?
It is y+3y-2y = 2y simplified
Then 3y+1-2y can be simplified to y+1
-4(7x-3y-z)-(-6)(9x-z+2)
That would depend on the plus or minus value of 3y or maybe an equality is missing none of which have been given.