Question

the teacher tell the Calss that the highest mark obtains by student in her Calss is three times the lowest mark minus seven if the highest are 86 find the lowest mark​

Answer 1

Answer:

lowestmarksbex

solowestmarks=3x−7

highestmarks=86

equation

86=3x−7

86+7=3x

93=3x

3

93

=x

31=x

Answer 2

Answer:

let lowest mark be x

then 3x -7=86

3x=93

x=93/3=31