There’s an easier way to all of the questions,
i.e. In question no.2: 7=4a-1. All you do is bring -1 over to the 7 which = 7+1 which equals 8. Then divide that by 4 to = 2
except you are able to do number two wayyy easier than the way you are doing it. because once you make the problem to 8=4a all you have to do is use inverse operations. so all you have to do is divide 4a by 4 to cancel them out and then divide 8 by 4 to make it even on each side to get 2. so variable a=2.
a better way is interchanging the numbers…when positive is transfered to another side it becomes negative…in the same way a multiplication when transfered to that side becomes division.
i think the mathematics question quite easy…bt y the teacher explain like so difficult???
exp:5-2x=3x+1 5-1 =3x+2x 4=5x x=4/5 and I it was easier for me to add 2x to each side, instead of subtracting 3x like he did…is there a reason why he did it that way?