490-y7=350

To solve the equation 490 - y7 = 350, you need to isolate the variable y.

To do this, you can start by rearranging the equation:

490 - y7 = 350

Add y7 to both sides of the equation:

490 - y7 + y7 = 350 + y7

The y7 terms on the left side of the equation will cancel each other out:

490 = 350 + y7

Next, subtract 350 from both sides to isolate y7:

490 - 350 = 350 + y7 - 350

140 = y7

Therefore, the solution to the equation 490 - y7 = 350 is y7 = 140.