solve the 8-3/x=7 by trial and error
Answers
Answer: x = 3
Step-by-step explanation: Anyone can do it by trial and error, a better technique is to simplify the equation until we have an amswer with x on one side and a number on the other side.
As this is an equation we do this to both sides to keep the equation balanced.
8 - 3/x = 7
Because of the laws of bidmas/bodmas, division is done before subtraction, so to not get confused we should set the equation out like this:
8 - (3/x) = 7
times by x: 8x + -3 = 7x
simplify: 8x - 3 = 7x
+3: 8x = 7x + 3
-7x: 8x - 7x = 7x - 7x + 3
simplify: 1x = 3
so your answer is x = 3.
Hope this helps.
Answer:
x = 5/7
Step-by-step explanation:
Q. 8-3/x = 7
Solution:
8 - 3 = 7x
5 = 7x
5/7 = x
5/7 = x
x = 5/7
Here are the details if you want to understand it much better:
We'll move the x to the Left Hand Side (LHS) of the equation:
The reason why x is being multiplied (we know it is being multiplied because when there is no sign between a number and a variable - i.e. the - sign, or + sign - it means that it is being multiplied) with 7, is because when we move the variable which is being divided, to the opposite side, we have to change the division sign to multiplication. Same goes for addition and subtraction.
8 - 3 = 7x
Now, we'll subtract 3 from 8 and the answer will simply be 5 which we have to write.
5 = 7x
We now know that if 7 is multiplied with x, the answer will be 5. But since we want to find that what is x equal to, and not 7x, we'll once again move the number to the other side, this time, it is the number 7 we'll move, not x, and we'll move 7 to the Right Hand Side (RHS), not LHS. And as we know, that when we move a number or variable to opposite side, it'll be multiplied, and if it is being multiplied on the first side, then it'll be divided on the other side. So, we'll move 7 to the RHS and it'll be divided because it was multiplied with x at first.
5/7 = x
So now, we have our answer which is given below.
x = 5/7