Asked by KYLIE
what is the value of x in the diagram?
A. 1/2
B. 4/21
C. 2
D. 4
The fractions for cross multiplication are 9/4x-2 and 12/3x+2
I tried to do it but it was not an answer and i dont know what i did wrong
A. 1/2
B. 4/21
C. 2
D. 4
The fractions for cross multiplication are 9/4x-2 and 12/3x+2
I tried to do it but it was not an answer and i dont know what i did wrong
Answers
Answered by
Steve
Hard to say what you did wrong, since you didn't show your work.
First, learn to use parentheses:
9/(4x-2) = 12/(3x+2)
9(3x+2) = 12(4x-2)
27x+18 = 48x-24
21x = 42
x = 2
First, learn to use parentheses:
9/(4x-2) = 12/(3x+2)
9(3x+2) = 12(4x-2)
27x+18 = 48x-24
21x = 42
x = 2
Answered by
KYLIE
but how did you get to 21x=42 i dont get what you did @Steve
Answered by
Star Lord
you cross multiply
Answered by
Tjf
To get 21x=42, you move the constants to one side and the terms with variables to the other.
27x+18=48x-24
+24 +24
-------------------------------
27x+42=48x
-27x -27x
--------------------------
42=21x
27x+18=48x-24
+24 +24
-------------------------------
27x+42=48x
-27x -27x
--------------------------
42=21x