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2x - 4y = 20 x =4 a. 4, -2 b. 4, 3 c. 4, 4 d. 4, -3
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3 votes
2x - 4y = 20
x =4
a. 4, -2
b. 4, 3
c. 4, 4
d. 4, -3

User Abolfazl Miadian
by
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1 Answer

4 votes
D. 4, -3 Because you plug in 4 for the x and 2•4 is 8, then you subtract 8 from both sides of the equal sign. (20-8=12) then you’re left with -4y = 12 divide by -4 on both sides of the equal sign, and y= -3 (and you’re already given the value of x)
User Aleksy Goroszko
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7.8k points
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