Equation A: y = 2x + 4
Equation B: y = 3x + 1
Which of the following is a step that can be used to find the solution to the set of equations?
2x + 4 = 3x + 1
2x = 3x + 4
2x + 4 = 3x
2x + 1 = 3x + 4
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OpenStudy (ccchristian1):
plz help me
OpenStudy (ccchristian1):
anyone ?
OpenStudy (lalipapa123):
i;ll try
OpenStudy (ccchristian1):
thank you
OpenStudy (lalipapa123):
what do you think the answer is?
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OpenStudy (lalipapa123):
its first
OpenStudy (anonymous):
Tried solving it and boom you will have the answer immediately (no kidding)
OpenStudy (lalipapa123):
if my answer helped you medal me
OpenStudy (ccchristian1):
first one ?
OpenStudy (lalipapa123):
yeah
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OpenStudy (lalipapa123):
if my answer helped you plzz medal me!
OpenStudy (ccchristian1):
okay
OpenStudy (ccchristian1):
i have another question
OpenStudy (lalipapa123):
yes plzzz?!
OpenStudy (anonymous):
The answer wasn't A :o
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OpenStudy (ccchristian1):
whats the answer guys I'm confused
OpenStudy (lalipapa123):
then say me what it is!@Mateaus
OpenStudy (lalipapa123):
@Mateaus
OpenStudy (ccchristian1):
whats the right answer ?
OpenStudy (lalipapa123):
the answer is [a]
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OpenStudy (ccchristian1):
you sure?
OpenStudy (ccchristian1):
@Mateaus
OpenStudy (ccchristian1):
what do you think @Mateaus
OpenStudy (lalipapa123):
yes i am syre about that
OpenStudy (lalipapa123):
if you substitute the value of 'y' from equ.1 in equ.2 you will get the same!
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OpenStudy (ccchristian1):
ok thank you
OpenStudy (ccchristian1):
i got another question
OpenStudy (ccchristian1):
y = 3x + 3
y = x − 1
Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.
OpenStudy (lalipapa123):
To solve using substitution, you first have to choose one equation to work with, then isolate one variable in that equation.
using the second equation, x - y = 3, I can solve for y by subtracting x from both sides of the eqn.
- y = 3 - x
Now multiply both sides by (-1) to solve for y
y = -3 + x
Now I substitute my solution for y ( -3 + x) into the other equation in place of y.
3x + y = 1
3x + (-3 + x) = 1
Group like terms and solve for x
3x + - 3 + x = 1
4x + -3 = 1
4x = 4
x = 1
Now you can solve for y by subsituting x = 1 into the solution for y: y = -3 + x
y = -3 + x
y = -3 + 1
y = -2