Hey there, Arahelp!
The equation for the given problem is 2x - 2 = 10
It's saying the difference between twice a number (2x) and two (2) is equal to 10
x being the number.
When you solve for x, you get a total of 6. Now let's replace that number into the equation.
2(6) - 2 = 10
12 - 2 = 10
10 = 10
So the correct answer is the second one, x = 6.
For the second problem is saying that machine A do 50 more than 4 times parts than machine B does.
So, if machine A makes 650, how much does machine B make?
We can put this into an equation.
650 = 4x + 50
x being the amount machine B makes.
So, we solve for x
600 = 4x (I subtracted 50 from both sides)
150 = x (I divided by 4 in both sides)
So, machine B makes 150 parts.
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