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SSSSS [86.1K]
3 years ago
11

What is the solution to the system of equations below? y = negative one-third x + 9 and y = two-thirds x minus 12 (21, 2) (21, –

10) (–21, 16) (–21, –26)
Mathematics
1 answer:
lora16 [44]3 years ago
6 0

Answer:

(21, 2 )

Step-by-step explanation:

Given the 2 equations

y = - \frac{1}{3} x + 9 → (1)

y = \frac{2}{3} x - 12 → (2)

Substitute (2) into (1)

\frac{2}{3} x - 12 = - \frac{1}{3} x + 9 ( add \frac{1}{3} x to both sides )

x - 12 = 9 ( add 12 to both sides )

x = 21

Substitute x = 21 into either of the 2 equations and evaluate for y

Substituting into (2)

y = \frac{2}{3} × 21 - 12 = 14 - 12 = 2

Solution is (21, 2 )

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