An exam has 20 exercises. For every exercise solved correctly you get 8 points and for every exercise solves wrong are taken off 5 points. Ben had 13 points. How many exercises did he solve?

step-by-step explanation:

you divide the denominator by the numerator on both sides and if the quotients are equal then the fractions are equivalent

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

if x = 1, then the answer is 3.5

step-by-step explanation: