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the expression is:
[tex]-7(2x-5)=-49[/tex]first we will need the distributive property:
[tex]-14x+35=-49[/tex]then we can use the addition or subtraction property:
[tex]14x=84[/tex]And finaly, we apply the multiplication or division property:
[tex]x=\frac{84}{14}=6[/tex]