Question

–10 times the first equation and 3 times the second equation

10 times the first equation and 3 times the second equation
–3 times the first equation and 5 times the second equation
3 times the first equation and 5 times the second equation

Answer 1

Its the second one x=5

Explanation:

I took the test.

Answer 2

-10 times the first equation and 3 times the second equation

Explanation:

Multiply the first equation by 10 and the second equation by -3:

1. 1/5 x + 3/4 y = 9

x-10 ⇒ -2x - 15/2 y = -90

2. 2/3 x - 5/6 y = 8

x3 ⇒ 2x - 5/2 y = 24

Add the equations together:

-2x - 15/2 y = -90

+ 2x - 5/2 y = 24

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0x - 10y = -66