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-378=-7(-7x-2)
We simplify the equation to the form, which is simple to understand
-378=-7(-7x-2)
Reorder the terms in parentheses
-378=+(+49x+14)
Remove unnecessary parentheses
-378=+49x+14
We move all terms containing x to the left and all other terms to the right.
-49x=+14+378
We simplify left and right side of the equation.
-49x=+392
We divide both sides of the equation by -049 to get x.
x=-8
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