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5x+3=12x-20
Multiply both sides of the equation by 4.
5x+3-12x=-20
Subtract 12x from both sides.
-7x+3=-20
Combine 5x and -12x to get -7x.
-7x=-20-3
Subtract 3 from both sides.
-7x=-23
Subtract 3 from -20 to get -23.
x=\frac{-23}{-7}
Divide both sides by -7.
x=\frac{23}{7}
Fraction \frac{-23}{-7} can be simplified to \frac{23}{7} by removing the negative sign from both the numerator and the denominator.