Multiply both sides of the equation by 105, the least common multiple of 7,3,5.
Use the distributive property to multiply 15 by x+3.
Use the distributive property to multiply -35 by 2x-5.
Combine 15x and -70x to get -55x.
Add 45 and 175 to get 220.
Use the distributive property to multiply 21 by 3x-5.
Subtract 2625 from -105 to get -2730.
Subtract 63x from both sides.
Combine -55x and -63x to get -118x.
Subtract 220 from both sides.
Subtract 220 from -2730 to get -2950.
Divide both sides by -118.
Divide -2950 by -118 to get 25.