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To simplify the expression
[tex]-8(1+x)+7x[/tex]first we have to deal with the parenthesis, so we have that:
[tex]-8(1+x)\text{ = -8 -8x}[/tex]Then, we add similar terms:
[tex]-8-8x+7x\text{ = -8-x}[/tex]We can simplify even further if we take out the minus sign:
[tex]-8-x\text{ = -(x+8)}[/tex]