anonymous
  • anonymous
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.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
can you substitute the value of y from one equation in for y in the other equation?
anonymous
  • anonymous
yes? i think so
anonymous
  • anonymous
ok try it

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anonymous
  • anonymous
what do you get?
anonymous
  • anonymous
y= y-1?
anonymous
  • anonymous
it says y = 3x + 3 and y = x - 1, so if y is equal to both of those things can you set those things equal to each other?
anonymous
  • anonymous
yes because they are equal.. i think so, math is my worst:(
anonymous
  • anonymous
its fine, so set them equal to each other, what do you get?
anonymous
  • anonymous
y=3y+3??
anonymous
  • anonymous
ok lets try a simpler problem, then come back to this one
anonymous
  • anonymous
if y = 10 and y = x then doesn't 10 = x
anonymous
  • anonymous
yes
anonymous
  • anonymous
ok so you have y = 3x + 3 and y = x - 1 so what is 3x + 3 equal to 3x + 3 = ?
anonymous
  • anonymous
|dw:1433948530931:dw|
anonymous
  • anonymous
do you see how i substituted the value of y from one equation into y in the other, that is substitution
triciaal
  • triciaal
this is what I normally use y = y regardless of how it is expressed example 10 = 6 + 4 and 10 = 8 + 2 10 = 10 so 6 + 4 = 10 + 2
anonymous
  • anonymous
@leah.mariexx if you have questions please ask
triciaal
  • triciaal
now you have one equation with one unknown solve for this variable then use this value in either of the expressions to get the value of the other variable
triciaal
  • triciaal
for this problem continue from the drawing by @billj5 find x replace x in the expression for y and find y solution (x, y)
anonymous
  • anonymous
im sorry @billj5 my dad needed the computer thanks for your help
anonymous
  • anonymous
np, yw

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