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199-90x=1819
We simplify the equation to the form, which is simple to understand
199-90x=1819
We move all terms containing x to the left and all other terms to the right.
-90x=+1819-199
We simplify left and right side of the equation.
-90x=+1620
We divide both sides of the equation by -90 to get x.
x=-18
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