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(-4/7)*x-(5/2) = -5/4 // + -5/4
(-4/7)*x-(5/2)-(-5/4) = 0
(-4/7)*x-5/2+5/4 = 0
-4/7*x-5/4 = 0 // + 5/4
-4/7*x = 5/4 // : -4/7
x = 5/4/(-4/7)
x = -35/16
x = -35/16
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