Question

isoltating the variable
2b-9=1

Answer 1

2b - 9 = 1
2b = 1 + 9
2b = 10
divide by 2:
b = 5

Answer 2

x-3=11

Answer 3

Try it yourself, start with adding 3 to both sides.

Answer 4

14?

Answer 5

and 6

Answer 6

Yeah x = 14.

Answer 7

-5 + 1/5 a=4

Answer 8

Do you mean
\[-5 + \frac{ 1 }{ 5 }a = 4\]

Answer 9

mhmm

Answer 10

start with adding something to the equation to leave the variable alone.

Answer 11

like what?

Answer 12

what number will make 1/5 a stay alone on the left side?

Answer 13

i took away 4 from -5 and 4

Answer 14

So now you've got
\[-9 + \frac{ 1 }{ 5 }a = 0\]

Answer 15

oh like stay alone wait so i take away -5?

Answer 16

That's right.

Answer 17

ok so then -5-4?

Answer 18

Do you know what an "inverse" operation is? @meggy

Answer 19

nope

Answer 20

No, if you subtruct -5 it's actually like adding 5. -(-5) = 5

Answer 21

Inverse operations: Operations that "undo" each other. For example multiplication and division.

Answer 22

Do you understand that definition @meggy ?