Determining the solutionfind the solution to the system of equations: x + 3y = 7and 2x + 4y = 81. isolate x in the first equation: 2. substitute the value for x into the second equation: 3. solve for y: x = 7 - 3y207 – 3y) + 4y = 814-6y + 4y = 814 – 2y = 8-2y = -6y = 3x + 3(3) = 74. substitute y into either original equation: 5. write the solution as an ordered pair: introdone0000000000

(-2,  3).

Step-by-step explanation:

x + 3y = 7

2x + 4y = 8

1 .   x = 7 - 3y.

2.  2(7 - 3y) + 4y = 8

3.  14 - 6y + 4y = 8

   -2y = -6

    y = 3

4.  Substitute y in the second equation:

    2x + 4(3) = 8

    2x = -14

      x = -2..

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.