Question

Question 9 of 10

What is the solution to this equation?
9 - 4x + 7x = 15
O A. X=-2
B. X = 2
C. x = 8
O o
D. x = -8

Answer 1

9-4x+7x=15
9+3x=15
move 9 to the other side
sign changes from +9 to -9
9-9+3x=15-9
3x=6
Divide by 3 for both sides
3x/3=6/3
Cross out 3 and 3, divide by 3 and then becomes 1*1*x=x
x=2
Answer: x=2

Answer 2

B is the answer

Explanation:

hope this help