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2+21x+24=0
We simplify the equation to the form, which is simple to understand
2+21x+24=0
We move all terms containing x to the left and all other terms to the right.
+21x=0-2-24
We simplify left and right side of the equation.
+21x=-26
We divide both sides of the equation by 21 to get x.
x=-1.2380952380952
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