Question

solve the following equations using the method indicated?

a. substitution
y=3x+4
y=2x+6

Answer 1

first one?
What's the question?

Answer 2

what do you mean

Answer 3

the first part of the question doesn't make sense... is it y=3x=4 or y=3x-4?

Answer 4

+ sorry ...

Answer 5

Ok
y=3x+4
y=2x+6

2x+6=3x+4 (subsitute y in second equation into first)
2x-3x=4-6
-x=-2
x=2

Answer 6

and y is

Answer 7

y= 3(2) +4
y=6+4
y=10

(subsitute x value in any of two equations)

Answer 8

i really don't get any of this... i suck at math period...

Answer 9

because both equations are equivalent (equal one another) You can replace the first equation into the second... and the y value in the second equation can replace the y value in the first equation... then you have two equaions which you can solve for y... then u get the y value and can alternatively choose either equation to substitute that value to get the x valuel...

Answer 10

sorry i don't get get any of this

Answer 11

awwww. mmmm it's substitution... I had trouble with it at first. Try asking a teacher for more help or anyone here on basic rules for substitution. I'm tired and am off to bed.. Sorry I can;t help you more :(

Answer 12

the thing is my exam is tomorrow :(