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