Question

Find the value for m, n for :4m+3n+24=0, 7m-2n=-13

• A. 3 , -5
• B. -3, -4
• C. 4, -3
• D. 4, -5

Answer 1

The correct option is B

-3, -4

4m+3n+24=0

4m+3n=-24 .....................(i)

and 7m-2n=-13 .......................(ii)

Solving equations (i) and (ii) we get

29n=-116

$\Rightarrow$ $n=-\frac{116}{29}=-4$

Substituting value of n in equation (i) we get

4m+3n=-24

$\Rightarrow$4m+3(-4)=-24

$\Rightarrow$4m-12=-24

$\Rightarrow$4m=-12

$\Rightarrow m=-\frac{12}{4}=-3\Rightarrow m=-3,n=-4$