Question

URGENT!! PLEASE HELP! WILL MEDAL AND FAN!
x+y=7
2x+3y=19
is (2,5) a solution to the linear equation?
is (3,4) a solution?

Answer 1

no 2,5 is

Answer 2

I placed an equal sign where I think you meant to have typed one.

Equation 1: x + y = 7
Equation 2: 2x + 3y = 19


Solve equation 1 for y:

x + y = 7
Equation 3: y = 7 - x

Substitute (7 - x) for y in equation 2:


2x + 3y = 19

2x + 3(7 - x) = 19

2x + 21 - 3x = 19

21 - x = 19

-x = -2

x = 2

Substitute (2) for x is equation 3:

y = 7 - x

y = 7 - (2)

y = 5

So the solution is x = 2 and y = 5.

Answer 3

Thanks! :)