Answer:
x = 7
Explanation:
3x - 4 = 17
First, we move 4 from the left side of the function to the right side. When we move the number to another side, we have to change to the opposite direction (for example: from minus to plus, from multiple to divide).
Here, when in the left side, in front of 4 is "minus", so when we move it to the right side, we replace "minus" with "plus"
=> 3x = 17 + 4
We will do the underlined function first, 17 + 4 = 21 and 3x = 17 + 4, based on transitivity: 3x = 21
We have 3x = 21 => x * 3 = 21
To calculate x, we have to move 3 from the left side to the right side. As aforementioned, we have to change to the opposite direction from "multiple" to "divide"
=>x = 21/ 3 = 7
So that x = 7
