Question

8. Add 2r - 58'y + 2xy and 6xy + 4x - 7 and subtract the result from xy + +7yV
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Answer 1

add this:

$2r - 58y + 2xy + 6xy + 4x - 7$

$2r - 58y + 8xy + 4x - 7$

then subtract:

$(2r - 58xy + 8xy + 4x - 7) - (xy + 7y)$

$(2r - 58y + 8xy + 4x - 7 - xy - 7y)$

$2r - 51y + 7xy + 4x - 7$