У+56-4=123+142

To solve the equation у + 56 - 4 = 123 + 142, we can simplify it step by step:

1. Combine the like terms on both sides of the equation: у + 52 = 265

2. To isolate у, subtract 52 from both sides of the equation: у = 265 - 52

3. Simplify the expression on the right side: у = 213

Therefore, the value of у that satisfies the equation у + 56 - 4 = 123 + 142 is 213.