Question

(08.03)A set of equations is given below:

Equation S: y = x + 9
Equation T: y = 2x + 1

Which of the following steps can be used to find the solution to the set of equations?

x = 2x + 1
x + 9 = 2x
x + 1 = 2x + 9
x + 9 = 2x + 1

Answer 1

any thoughts ?

Answer 2

try substitution and what do u get ?

Answer 3

For example, consider the equations: x + y = 8 and x – y = 2.
x = 1, y = 7 is a solution of the first equation but not the second.
x = 4, y = 2 is a solution of the second equation but not the first.
x = 5, y = 3 is a solution of both equations at the same time, so it is the solution of these simultaneous equations.

Answer 4

'You might do this problem in your head. Sean’s daughter is 7, so “four times his daughter’s age” is 28, and 5 years added to that is 33. Sean is 33.



If you solved the problem like that, you used a simple substitution—you substituted in the value “7” for “his daughter’s age.” You learned in the second part of the problem that “his daughter is 7.” So substituting in a value of “7” for “his daughter’s age” in the first part of the problem was okay, because you knew these two quantities were equal.



Let’s look at a simple system of equations that can be solved using substitution.

Answer 5

What?

Answer 6

y = x + 9....so sub in x + 9 in for y in the other equation

Answer 7

thank you guys so much i got it now;0

Answer 8

Report them please guys

Answer 9

why they are just trying to help i think and hope lol

Answer 10

Look at all that! That's not helping.

Answer 11

true:0 why dont you report them