Question

Berta worked to solve a system of equations. 4x + y = –5 x – y = –5 Step 1: ??? Step 2: x = –2 Step 3: 4(–2) + y = –5 Step 4: –8 + y = –5 Step 5: y = 3 Berta determined that the solution is (–2, 3). Which could have been the equation Berta found in step 1?

Answer 1

4x + y = -5
 x -  y  = -5     Adding;_
5x = -10
x = -2

required equation is 5x = -10

Answer 2

5x= -10
I hope I could help.