Question

Karla is given the equation 10x + 15 = 20 to solve. She says the solution is 1/2

Which reason justifies her solution?

A) Karla says that to solve the equation you first add 15 and then multiply by 10.


B) Karla says that to solve the equation you first multiply by 10 and then add 15.


C) Karla says that to solve the equation you first subtract 15 and then divide by 10.


D) Karla says that to solve the equation you first divide by 10 and then subtract 15.

Answer 1

the answer is c because you need to isolate the x

Answer 2

The answer is C.

you do the inverse of positive 15, which is negative 15. so put it on both side .

10x +15 =20
-15 =-15

to equal

10x =5

then divide 10 on both side

10x = 5
----- -----
10 10


x = 5/10 or 1/2