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Mathematics
Olive Costa
17 May, 20:45
X-7y=53 - 4x-5y=19 solve for x and y
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Peep
17 May, 22:39
0
y = - 7; x = 4
Step-by-step explanation:
x - 7y = 53
x = 7y + 53
-4x - 5y = 19
-4 (7y + 53) - 5y = 19
-28y - 212 - 5y = 19
-33y = 231
-11y = 77
y = - 7
x - 7 (-7) = 53
x + 49 = 53
x = 4
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