anonymous
  • anonymous
Medal Solve by the substitution method 5x + 3y=8 3x +y = 8
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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pooja195
  • pooja195
3x +y = 8
pooja195
  • pooja195
What can we do so that the Y will be alone?
anonymous
  • anonymous
move it to the right side

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anonymous
  • anonymous
or move the 3x to the other side
pooja195
  • pooja195
good y=-3x+8 whats next?
anonymous
  • anonymous
sub in the other equation
pooja195
  • pooja195
good :) \[\huge~5x + 3(-3x+8)=8 \]
pooja195
  • pooja195
Solve that
anonymous
  • anonymous
5x -9x + 24 = 8
pooja195
  • pooja195
now combine the like terms :)
anonymous
  • anonymous
5x - 9x = 8 -24
pooja195
  • pooja195
ok 8-24=?
anonymous
  • anonymous
-4x / -4x = -16 / -4
anonymous
  • anonymous
answer is 4
anonymous
  • anonymous
x = 4
pooja195
  • pooja195
Good now what?
anonymous
  • anonymous
we sub in 4 to the other equation
pooja195
  • pooja195
good \[\huge~y=-3(4)+8 \]
pooja195
  • pooja195
Solve
anonymous
  • anonymous
y = -12x + 8
pooja195
  • pooja195
Where did u get x from?
pooja195
  • pooja195
Remeber we substituted 4 in place of x
anonymous
  • anonymous
ohh yeah sorry
anonymous
  • anonymous
so what is the next step
pooja195
  • pooja195
Solve :) y=-3(4)+8 -3 x 4 = ?
anonymous
  • anonymous
-12
pooja195
  • pooja195
-12 + 8 = ?
anonymous
  • anonymous
y = -12 + 8
pooja195
  • pooja195
-12+8=?
anonymous
  • anonymous
-4
pooja195
  • pooja195
good :) so x= ? y=?
anonymous
  • anonymous
x= 4 and y= -4
pooja195
  • pooja195
yep :)
pooja195
  • pooja195
(4,-4)
anonymous
  • anonymous
so is this the answer?
pooja195
  • pooja195
yes
anonymous
  • anonymous
thank you soo much :)
pooja195
  • pooja195
:)

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