[tex] 0.3(8 - 3y) = 3.2 - 0.8(y - 7) \\ \\ 2.4 - 0.9y = 3.2 - 0.8y + 5.6 \\ 2.4 - 0.9y = 8.8 - 0.8y \\ - 0.9y + 0.8y = 8.8 - 2.4 \\ - 0.1y = 6.4 \\ y = - 64[/tex]
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[tex] 0.3(8 - 3y) = 3.2 - 0.8(y - 7) \\ \\ 2.4 - 0.9y = 3.2 - 0.8y + 5.6 \\ 2.4 - 0.9y = 8.8 - 0.8y \\ - 0.9y + 0.8y = 8.8 - 2.4 \\ - 0.1y = 6.4 \\ y = - 64[/tex]