Question

Answer these 3 question that's your mind power.​

Answer 1

Q.8 :

$\therefore \: 4t \: + 5 = - t + 15 \\ \therefore 4t + t = 15 - 5 \\ \therefore 5t = 10 \\ \therefore \: t = \frac{10}{5} \\ \therefore \: \boxed {t \: = 2}$

Option ( C ) is Correct.

Q.9 :

$\therefore \: 2m - 10 = 7m - 15 + 5 \\ \therefore \: 2m - 10 = 7m - 10 \\ \therefore \:2m - 7m = - 10 + 10 \\ \therefore - 5m \: = 0 \\ -( \: Dividing \: both \: sides \: by \: -5 \: ) \\ \therefore \: \boxed {m \: = 0}$

Option ( C ) is Correct.

Q.10 :

$\therefore \: \frac{5m - 2}{2} = - 11 \\ \therefore \: 5m - 2 = - 11 \times 2 \\ \therefore \: 5m - 2 = - 22 \\ \therefore \: 5m = - 22 + 2 \\ \therefore \: 5m = - 20 \\ \therefore \: m = \frac{ - 20}{5} \\ \therefore \: \boxed {m = - 4}$

$We've \: to \: find \: the \: value \: of \: 2m + 3 \\ = 2m + 3 \\ = 2( - 4) + 3 \\ = - 8 + 3 \\ = \boxed { - 5}$