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\left(3x-1\right)\left(5x+13\right)-\left(5x+4\right)\left(4-6x\right)=3\left(3x-1\right)\left(5x+4\right)
Variable x cannot be equal to any of the values -\frac{4}{5},\frac{1}{3} since division by zero is not defined. Multiply both sides of the equation by \left(3x-1\right)\left(5x+4\right), the least common multiple of 5x+4,3x-1.
15x^{2}+34x-13-\left(5x+4\right)\left(4-6x\right)=3\left(3x-1\right)\left(5x+4\right)
Use the distributive property to multiply 3x-1 by 5x+13 and combine like terms.
15x^{2}+34x-13-\left(-4x-30x^{2}+16\right)=3\left(3x-1\right)\left(5x+4\right)
Use the distributive property to multiply 5x+4 by 4-6x and combine like terms.
15x^{2}+34x-13+4x+30x^{2}-16=3\left(3x-1\right)\left(5x+4\right)
To find the opposite of -4x-30x^{2}+16, find the opposite of each term.
15x^{2}+38x-13+30x^{2}-16=3\left(3x-1\right)\left(5x+4\right)
Combine 34x and 4x to get 38x.
45x^{2}+38x-13-16=3\left(3x-1\right)\left(5x+4\right)
Combine 15x^{2} and 30x^{2} to get 45x^{2}.
45x^{2}+38x-29=3\left(3x-1\right)\left(5x+4\right)
Subtract 16 from -13 to get -29.
45x^{2}+38x-29=\left(9x-3\right)\left(5x+4\right)
Use the distributive property to multiply 3 by 3x-1.
45x^{2}+38x-29=45x^{2}+21x-12
Use the distributive property to multiply 9x-3 by 5x+4 and combine like terms.
45x^{2}+38x-29-45x^{2}=21x-12
Subtract 45x^{2} from both sides.
38x-29=21x-12
Combine 45x^{2} and -45x^{2} to get 0.
38x-29-21x=-12
Subtract 21x from both sides.
17x-29=-12
Combine 38x and -21x to get 17x.
17x=-12+29
Add 29 to both sides.
17x=17
Add -12 and 29 to get 17.
x=\frac{17}{17}
Divide both sides by 17.
x=1
Divide 17 by 17 to get 1.