Solve the system of equations 2x + 3y = 40 and –2x + 2y = 20. A. x = –10, y = 20 B. x = 10, y = 20 C. x = –6, y = 4 D. x = 2, y = 12

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laceybugtorres laceybugtorres

04-03-2016
Mathematics

contestada

Solve the system of equations 2x + 3y = 40 and –2x + 2y = 20. A. x = –10, y = 20 B. x = 10, y = 20 C. x = –6, y = 4 D. x = 2, y = 12

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olemakpadu olemakpadu · Answer 1 · 2016-03-05T01:59:12+01:00

olemakpadu olemakpadu

05-03-2016

2x + 3y = 40
+
-2x + 2y = 20
___________ Adding both equations

0x + 5y = 60
____________

5y = 60
y = 60/5 = 12

y = 12.

Since we have gotten y =12, and the only option with that is option D.

So we don't have to solve for x.

The answer is D.

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Аноним Аноним · Answer 2 · 2021-04-15T15:05:08+02:00

Аноним Аноним

15-04-2021

Answer:

y=12

Step-by-step explanation:

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