Given equation is,
Cross multiplying both sides,
⇒ 45-15y = 8-72y
⇒ 45-8 = -72y + 15y (transposing 8 to LHS and – 15y to RHS)
⇒ 37 = -57y
⇒ y = -37/57
⇒ Hence value of y is .
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