What value of x makes the equation below true?
7x-1=9
A. 10/7
B. 8/7
C. 2/7
D. 16/7
What do you think?
Yes, A.
To find the value of x that makes the equation true, let's solve for x step-by-step.
Step 1: Start with the equation 7x - 1 = 9.
Step 2: Add 1 to both sides of the equation to isolate the variable: 7x - 1 + 1 = 9 + 1.
Simplifying, we get: 7x = 10.
Step 3: Divide both sides of the equation by 7 to solve for x: (7x) / 7 = 10 / 7.
Simplifying, we get: x = 10/7.
Therefore, the value of x that makes the equation true is A. 10/7.
To find the value of x that makes the equation 7x - 1 = 9 true, we need to isolate x.
First, we can start by adding 1 to both sides of the equation to get rid of the -1:
7x - 1 + 1 = 9 + 1
This simplifies to:
7x = 10
Next, we want to eliminate the coefficient of x (7) by dividing both sides of the equation by 7:
(7x)/7 = 10/7
Simplifying further:
x = 10/7
Therefore, the value of x that makes the equation true is 10/7.
Therefore, the correct answer choice is A. 10/7.