ldelousia ldelousia

01-04-2020
Mathematics

contestada

4y - 5x = 9
x = 4y + 11

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ChillMuse ChillMuse

01-04-2020

4y - 5x = 9

x = 4y + 11

We can substitute this value of x in the first equation:

4y - 5(4y+11) = 9

4y - 20y - 55 = 9

16y = -64

y = -4

x = 4y + 11

x = -16 + 11

x = -5

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