we have the expression
(3x-4)-(2x+7)
step 1
Remove the parenthesis
3x-4-2x-7
step 2
combine like terns
3x-2x=x
-4-7=-11
therefore
(8y+2)-(3y-6)
8y+2-3y+6
Combine like terms
8y-3y=5y
2+6=8
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