Question

u+2=4

Answer 1

what plus 2 two equals 4?

Answer 2

if you have some apples
I give you two more apples
now you have 4 apples
how many did you start with?

Answer 3

2:/

Answer 4

correct

Answer 5

i knew that my teacher wants a explantion for that .-.

Answer 6

i dont know how to write a explantion for that cuz its so simple

Answer 7

now lets look at the algebra
u+2 = 4
we have an equality so we may add/subtract the same number to both sides and still have equality
we want u to be by itself so we subtract 2 from both sides
\[u+2-2=4-2\]the 2's on the left cancel out\[u+\cancel{2}-\cancel{2}=4-2\]so
\[u=4-2=2\]

Answer 8

thank you :)

Answer 9

I guess cancel might not be the words to use but
\[u+2-2=4-2\\u+(2-2)=2\\u+0=2\\u=2\]

Answer 10

ok so i do the oppsite from the + sgin

Answer 11

sign*

Answer 12

correct

Answer 13

its gets a little different with multiplication, but this is how we do these problems

Answer 14

you did this much better then my teacher thank you

Answer 15

if it were multiplication i would use divsion to cancel it out

Answer 16

correct

Answer 17

thank you for your help :D