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Shamar Yates
2 March, 00:11
Find the solution of - x+5y=-18 5x-9y=10
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Kailyn Rasmussen
2 March, 04:06
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-x + 5y = - 18 so x = 5y + 18
5x-9y=10
substitute x = 5y + 18 into 5x - 9y = 10
5x - 9y = 10
5 (5y + 18) - 9y = 10
25y + 90 - 9y = 10
16y = - 80
y = - 5
x = 5y + 18
x = 5 (-5) + 18
x = - 25 + 18
x = - 7
answer
(-7, - 5)
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