how to solve this substitution problem??

Question

y=x+3
y=2x-4


i know the answer is supposed to be (7,10) but im not sure how to do this.

Answer 1

y=x+3
y=2x-4
first u need to replace the x+3 in place of y in the 2n equation to get this
x+3=2x-4
then subract the x from both sides to get this
3=x-4
then add 4 from both sides to get this
7=x
then replace the 7 in one of the equations to get y to get this
y=7+3
then you are going to get the anser like this
y=10
the answer is (7,10)

Answer 2

if y=x+3 and y=2x-4, then
x+3 = 2x - 4 ...adding 4 to both sides of the equation yields
x+7=2x ... subtracting x from both sides yields
7 = x ...now that you know what x is, what's Y?
y = x + 3 so substituting in x = 7, you get
y = 10.
The answer is x = 7, y = 10. (7,10)

Answer 3

since they both equal y then you can set it up as: x+3=2x-4 then you get the x by itself by adding 4 to both sides so you have x+7=2x then you take 1x away from both sides and you get x=7. i don't know where the ten came from...there should only b one answer to this problem as the equations are both straight lines

Answer 4

we will be substituting the 2d equation into the first equation, by way of the indisputable fact that's extra reachable. 2x - 7(9x+40 seven) - 37 blabla, will develop into -61x-366 x = -366/sixty one x = -6 positioned x into equation 9(-6)+40 seven = y y = -7

Answer 5

If each one is = to y, then they are = to each other:

x+3=2x-4
-x=-7
x=7

So, if x is = to 7, then plug it in:
y=x+3
y=7+3=10

Answer 6

x+3=2x-4
7=x

Answer 7

graph or set them equal to each other