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x-4=\left(5x+3\right)\times 3-1
Variable x cannot be equal to -\frac{3}{5} since division by zero is not defined. Multiply both sides of the equation by 5x+3.
x-4=15x+9-1
Use the distributive property to multiply 5x+3 by 3.
x-4=15x+8
Subtract 1 from 9 to get 8.
x-4-15x=8
Subtract 15x from both sides.
-14x-4=8
Combine x and -15x to get -14x.
-14x=8+4
Add 4 to both sides.
-14x=12
Add 8 and 4 to get 12.
x=\frac{12}{-14}
Divide both sides by -14.
x=-\frac{6}{7}
Reduce the fraction \frac{12}{-14} to lowest terms by extracting and canceling out 2.