I dont get it 2x-4=10 ..... I think I bring down the 4 with addition

Please help me below !

The senior class at a local high school is selling candy for their upcoming dance. For each candy bar that is sold, the class earns a profit of $3.50. Their goal is to earn $850. If they had $430 saved prior to the fundraiser, which equation will help the class determine how much candy they must sell?

$3.50x + $430 = $850

$430x + $3.50 = $850

Question

I dont get it 2x-4=10 ..... I think I bring down the 4 with addition 

Please help me below !

The senior class at a local high school is selling candy for their upcoming dance. For each candy bar that is sold, the class earns a profit of $3.50. Their goal is to earn $850. If they had $430 saved prior to the fundraiser, which equation will help the class determine how much candy they must sell?

 $3.50x + $430 = $850

 $430x + $3.50 = $850<----- my choice !

 $3.50x + $850 = $430

 $850x + $3.50 = $430

anonymous · Answer

2x - 4 = 10 (you add 4 to both sides)
     +4      +4
-------------
2x + 0 = 14
2x = 14
x = 14/2
x = 7

Next question :
x = number of candy bars sold
3.50x + 430 = 850 <--answer is A

anonymous · Answer

If you have any questions, please ask them.I will explain the best I can.