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-50x^{2}+5\left(3x-6\right)-2\left(4x-8\right)=50\left(2-x\right)\left(2+x\right)
Multiply both sides of the equation by 10, the least common multiple of 2,5.
-50x^{2}+15x-30-2\left(4x-8\right)=50\left(2-x\right)\left(2+x\right)
Use the distributive property to multiply 5 by 3x-6.
-50x^{2}+15x-30-8x+16=50\left(2-x\right)\left(2+x\right)
Use the distributive property to multiply -2 by 4x-8.
-50x^{2}+7x-30+16=50\left(2-x\right)\left(2+x\right)
Combine 15x and -8x to get 7x.
-50x^{2}+7x-14=50\left(2-x\right)\left(2+x\right)
Add -30 and 16 to get -14.
-50x^{2}+7x-14=\left(100-50x\right)\left(2+x\right)
Use the distributive property to multiply 50 by 2-x.
-50x^{2}+7x-14=200-50x^{2}
Use the distributive property to multiply 100-50x by 2+x and combine like terms.
-50x^{2}+7x-14+50x^{2}=200
Add 50x^{2} to both sides.
7x-14=200
Combine -50x^{2} and 50x^{2} to get 0.
7x=200+14
Add 14 to both sides.
7x=214
Add 200 and 14 to get 214.
x=\frac{214}{7}
Divide both sides by 7.