You can always add or subtract
same value to/from both sides of equation. The same is true about multiplication and division.
In your case you have to subtract
x from both sides of equation in order to get rid of it on the left side:


But it's easier to remember that if you want to move some member of equation to other side, you just have to
change it's sign. Let's practice a bit using your equation (I have added "plus" signs where they are usually omitted to better understend what's going on):

Move
2y to the right side:

Move
8 to the left side:

Move both
x and
2y to the right side:
I’m pretty sure it’s option D
Answer:
im assuming you want the original price, so $1.15
Step-by-step explanation:
2.80 / 7 = 0.40
0.75 + 0.40 = 1.15
Answer:
1660032
Step-by-step explanation:
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