## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$-8x+8y$
The given sentence translates to the expression, $[(4x+5y)+(-5x+6y)]-(7x+3y) .$ Removing the grouping symbols and then combining like terms, then the expression above simplifies to \begin{array}{l}\require{cancel} 4x+5y-5x+6y-7x-3y \\\\= (4x-5x-7x)+(5y+6y-3y) \\\\= -8x+8y .\end{array}