Solve using substitution -3x-4y=-2 y=2x-5

1)   I )-3X-4Y = -2

    Y = 2X-5, substitute it in I

-3X-4(2X-5) = -2 ⇒-3X-8X+20 = -2⇒-11X = -2-20 ⇒(-1) -11X = -22 ⇒11X= 22⇒X= 22/11 ⇒X= 2

-2/3,19/3.                                                 X=-2/3.                                                           Y=-19/3

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.