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y in (-oo:+oo)
(2/3)*(y+57) = 178 // - 178
(2/3)*(y+57)-178 = 0
2/3*(y+57)-178 = 0
2/3*(y+57)-178 = 0
2/3*y-140 = 0
2/3*y-140 = 0
2/3*y-140 = 0 // + 140
2/3*y = 140 // : 2/3
y = 140/2/3
y = 210
y = 210
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