Question

7.8y+9=6.8y-2
how do i solve this?

Answer 1

Since it has an equals sign, it means that the left is equal to the right. So what you can do is add or subtract something to both sides, and it stays the same, right?

So in this case we can subtract 6.8y from both sides and get
y+9=-2

Now do it one more time to get y by itself.

Answer 2

7.8y+9=6.8y-2
56y+9=48y-2
56y-48y=-2-9
8y=-11
y= -11/8

Answer 3

@shubham.bagrecha That's just wrong.

Answer 4

how?

Answer 5

@mf0000 7.8 means 7*8 or its decimal point?

Answer 6

*

Answer 7

@shubham.bagrecha Are you @mf0000 ?

Answer 8

i dont think so

Answer 9

No its a decimal point.

Answer 10

@Kainui check yours.
it will be 8y= -11.

Answer 11

@curiousshubham just use common sense.

Answer 12

7.8y + 9 = 6.8y - 2
y = -2 - 9
= -11

Answer 13

Common sense tells me that it's a decimal point. Decimal points exist in mathematics lol.

Answer 14

Am I right?

Answer 15

decimal...

Answer 16

mf, just listen to what my first response was. pratu has the right answer, he finished the problem for you.

Answer 17

@shubham.bagrecha don't use your common sense too much....

Answer 18

yeah @pratu043 its -11.

Answer 19

thanks!!!!

Answer 20

welcome and welcome to OS

Answer 21

7x+9=6x-2 , x= 8y
7x-6x = -2-9
x= -11
8y=-11