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3 years ago

10

Solve the system of equations using substitution. 3x + 2y = 7 y = –3x + 11

1 answer:

Maksim231197 [3]3 years ago

4 0

<span>3x + 2y = 7
y = –3x + 11

replace </span>y = –3x + 11 into 3x + 2y = 7

3x + 2y = 7
3x + 2(–3x + 11) = 7
3x -6x + 22 = 7
-3x = 7 - 22
-3x = -15
x = 5

<span>y = –3x + 11
y = -3(5) + 11
y = -15 + 11
y = -4

x = 5 and y = -4

answer: </span><span>D. (5, –4)</span>

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