Answer:
There are 80 marks in total.
Step-by-step explanation:
Let the number of total marks be
.
The percentage score of the student can be written as the ratio
.
However,
.
Equating the two:
.
Cross-multiply (that is: multiple both sides by
, the product of the two denominators) to get
.
.
In other words, there are 80 marks in total.
Answer:
x = 3
Explanation:
4x = 2x +6
2x = 6
x = 3
Answer:
<em>a </em>- 13
Step-by-step explanation:
a- 13 because you are taking 13 away from a