Respuesta :
-4(7a+5)=-160
-28a-20=-160 multiply through by -4
-28a=-160+20 add 20 to both sides
-28a=-140
a=-140/-28 divide both sides by -28
a= 5
you distribute -4 into 7a+5 making it -28a-20=-160 add 20 on both sides -160+20=-140 then divide -28 to -140 making a=5
