Question

answere 13 plz fast tell

Answer 1

a+b=5
2a+2b=10
2a-4b= -8

Answer 2

1. a+ b= 2+3
           =5
2. 2a+2b =2*2+2*3 [the sign * means multiply ]
               =4+6
               =10
3. 2a-4b =2*2-4*3
              =4-12
              = -8 [ negative 8 ]