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Substitution method.
2x+8y=20
y=2
pls help lol

User Rashad
by
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1 Answer

9 votes

Hey there!

2x + 8y = 20

2x + 8(2) = 20

2x + 16 = 20

SUBTRACT 16 to BOTH SIDES

2x + 16 - 16 = 20 - 16

CANCEL out: 16 - 16 because it give you 0

KEEP: 20 - 16 because it help solve for the x-value

NEW EQUATION: 2x = 20 - 16

SIMPLIFY IT!

2x = 4

DIVIDE 2 to BOTH SIDES

2x/2 = 4/2

CANCEL out: 2/2 because it give you 1

KEEP: 4/2 because it give you the x-value

NEW EQUATION: x = 4/2

SIMPLIFY IT!

x = 2

Therefore, your answer is: x = 2

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

User Nickknack
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