## Introductory Algebra for College Students (7th Edition)

x=$\square$-$\triangle$
6x-$\triangle$=7x-$\square$ First subtract 6x from both sides -$\triangle$=7x-6x-$\square$ -$\triangle$=x-$\square$ Then add $\square$ to both sides -$\triangle$+$\square$=x $\square$-$\triangle$=x x=$\square$-$\triangle$