10-5(7у-6:2)=3

Let's solve this step by step:

1. 6 divided by 2 is 3
2. 7y - 3
3. Multiply the result by 5: 5(7y - 3) = 35y - 15
4. Subtract the result from 10: 10 - (35y - 15) = 10 - 35y + 15 = -35y + 25

Now, the equation becomes:

-35y + 25 = 3

Next, we can solve for y:

-35y + 25 = 3 -35y = -22 y = -22 / -35 y = 22 / 35 or 0.6286

Therefore, the solution to the equation is y = 22/35 or approximately 0.6286.