Can someone explain to me how to solve this? use elimination to solve each system of equations. x + y = 7 x - y = -3

Clear out any fractions by Multiplying every term by the bottom parts.Add or Subtract the same value from both sides.Divide every term by the same nonzero value.Combine Like Terms.Factoring.Expanding (the opposite of factoring) may also help.

The answer is

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.