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\left(35-x\right)\left(4-9.45\right)=\left(x-30\right)\left(9.45-10\right)
Variable x cannot be equal to any of the values 30,35 since division by zero is not defined. Multiply both sides of the equation by \left(x-35\right)\left(x-30\right), the least common multiple of 30-x,x-35.
\left(35-x\right)\left(-5.45\right)=\left(x-30\right)\left(9.45-10\right)
Subtract 9.45 from 4 to get -5.45.
-190.75+5.45x=\left(x-30\right)\left(9.45-10\right)
Use the distributive property to multiply 35-x by -5.45.
-190.75+5.45x=\left(x-30\right)\left(-0.55\right)
Subtract 10 from 9.45 to get -0.55.
-190.75+5.45x=-0.55x+16.5
Use the distributive property to multiply x-30 by -0.55.
-190.75+5.45x+0.55x=16.5
Add 0.55x to both sides.
-190.75+6x=16.5
Combine 5.45x and 0.55x to get 6x.
6x=16.5+190.75
Add 190.75 to both sides.
6x=207.25
Add 16.5 and 190.75 to get 207.25.
x=\frac{207.25}{6}
Divide both sides by 6.
x=\frac{20725}{600}
Expand \frac{207.25}{6} by multiplying both numerator and the denominator by 100.
x=\frac{829}{24}
Reduce the fraction \frac{20725}{600} to lowest terms by extracting and canceling out 25.