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100+5\left(x-1\right)-4\left(2x+3\right)=-200
Multiply both sides of the equation by 20, the least common multiple of 4,5.
100+5x-5-4\left(2x+3\right)=-200
Use the distributive property to multiply 5 by x-1.
95+5x-4\left(2x+3\right)=-200
Subtract 5 from 100 to get 95.
95+5x-8x-12=-200
Use the distributive property to multiply -4 by 2x+3.
95-3x-12=-200
Combine 5x and -8x to get -3x.
83-3x=-200
Subtract 12 from 95 to get 83.
-3x=-200-83
Subtract 83 from both sides.
-3x=-283
Subtract 83 from -200 to get -283.
x=\frac{-283}{-3}
Divide both sides by -3.
x=\frac{283}{3}
Fraction \frac{-283}{-3} can be simplified to \frac{283}{3} by removing the negative sign from both the numerator and the denominator.