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3\left(3x+500\right)=25\left(x-100\right)
Variable x cannot be equal to 100 since division by zero is not defined. Multiply both sides of the equation by 15\left(x-100\right), the least common multiple of 5x-500,3.
9x+1500=25\left(x-100\right)
Use the distributive property to multiply 3 by 3x+500.
9x+1500=25x-2500
Use the distributive property to multiply 25 by x-100.
9x+1500-25x=-2500
Subtract 25x from both sides.
-16x+1500=-2500
Combine 9x and -25x to get -16x.
-16x=-2500-1500
Subtract 1500 from both sides.
-16x=-4000
Subtract 1500 from -2500 to get -4000.
x=\frac{-4000}{-16}
Divide both sides by -16.
x=250
Divide -4000 by -16 to get 250.