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Solve for the variable and express the answer in set notation.
|5x - 4|= 11

1 Answer

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Hey there!

ORIGINAL EQUATION

|5x - 4| = 11

~~~~~~~~~~~~~~~~~~~~
Possible EQUATION #1

5x - 4 = 11

ADD 4 to BOTH SIDES

5x - 4 + 4 = 11 + 4

CANCEL out: -4 + 4 because it gives you 0

KEEP: 11 + 4 because it help solve for the x-value


NEW EQUATION: 5x = 11 + 4

SIMPLIFY IT!

5x = 15


DIVIDE 5 to BOTH SIDES

5x/5 = 15/5


CANCEL out: 5/5 because it gives you 1

KEEP: 15/5 because it help solve for the x-value

NEW EQUATION: x = 15/5


SIMPLIFY IT!

x = 3

~~~~~~~~~~~~~~~~~~~~
Possible EQUATION #2

5x - 4 = -11


ADD 4 to BOTH SIDES

5x - 4 + 4 = -11 + 4


CANCEL out: -4 + 4 because it gives you 0

KEEP. -11 + 4 because it help solve for the x-value


NEW EQUATION: 5x = -11 + 4


SIMPLIFY IT!

5x = -7


DIVIDE 5 to BOTH SIDES

5x/5 = -7/5


CANCEL out: 5/5 because it gives you 1

KEEP: -7/5 because it help solve for the x-value


NEW EQUATION: x = -7/5


SIMPLIFY IT!

x = -7/5

~~~~~~~~~~~~~~~~~~~~~~~


ANSWER

x = 3 or x = -7/5


Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

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