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Anna11 [10]
2 years ago
9

What is 2x-3y=9 -5x-3y=30

Mathematics
2 answers:
lina2011 [118]2 years ago
8 0
 2x - 3y = 9   ⇒ -10x + 15y = -45
-5x - 3y = 30 ⇒ <u>-10x -   6y =   60</u>
                                      <u>9y</u> = <u>15</u>
                                       9      9
                                       y = 1 2/3
                     2x - 3(1 2/3) = 9
                               2x - 5 = 9
                               <u>     +5  +5</u>
                                     <u>2x</u> = <u>4</u>
                                      2     2
                                       x = 2
                                 (x, y) = (2, 1 2/3)
Shkiper50 [21]2 years ago
3 0
If your in algebra 1 then i'm pretty sure you subtract the 2x and that cancels and subract the 2x with the 9 and you have -3y= -2x+9 so you divide -3 to the -3y, the -2x and positive 9 and your answer will be y=2/3x-3
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