Question

Solve using the addition principle
t-7=18

Answer 1

okay. lets see, t -7 =18
what should you add to t-7 to get t+0?

Answer 2

in other words, what do you add to -7 to make it 0?

Answer 3

u set it up like t-7 +7

Answer 4

okay very good. so if you add 7 to the left hand side of the equation, you must add it to the right hand side also to make the equation equal.
so t - 7+7 = 18+7

Answer 5

so the answer will be T=25

Answer 6

yes. that is right.

Answer 7

now what if a problem is 4=b-4

Answer 8

same thing

Answer 9

use the same principle. exactly. it is the same thing

Answer 10

in the earlier problem, you found out t = 25.

Answer 11

right

Answer 12

so this set up will be like 4+4 = b-4+4

Answer 13

your equation was t - 7 = 18
so what is t?. if you put t = 25, you get 25 minus 7 is 18. which is exactly right. similarly in your new problem, it is:
some number b - 4 gives 4

Answer 14

right

Answer 15

the answer will be 8 = b

Answer 16

just put it in words. b-4 = 4 means " the number BEE minus the number 4, gives me a number 4". so what is BEE?

Answer 17

exactly. and you know b = 8 because 8 minus 4 is equal to 4.

Answer 18

oh k thank you

Answer 19

you are welcome