sum of 19 plz i need help

Question

wht makes 19 and wht subtracts to 7?

Answer 1

You want to find two numbers, so you will need two variables:

x + y = 19

x - y = 7

You can solve the system of equations using substitution or elimination.

Since there is a positive "y" in the first equation and a negative "y" in the second equation, use elimination. Add the two equations to eliminate the "y" variable.:

x + y = 19

x - y = 7

2x = 26

Divide both sides by 2: x = 26/2 = 13

To find "y" substitute "x" back into either of the equations and solve for "y":

13 + y = 19

Subtract 13 from both sides: y = 19-13 = 6

CHECK by putting both variables into the other equation:

13 - 6 = 7

ANSWER: 13 and 6