3/4 y+ 1/3(y-4) =y+1 / 7
3/4y+⅓y-⁴/³=y+¹/713/12y-4/3=y+1/713/12y-y=1/7+4/3¹/12y=31/12y=31
³/₄y + ¹/₃(y - 4) = y + ¹/₇³/₄y + ¹/₃(y) + ¹/₃(-4) = y + ¹/₇ ³/₄y + ¹/₃y + (-1¹/₃) = y + ¹/₇ ³/₄y + ¹/₃y - 1¹/₃ = y + ¹/₇ 1¹/₁₂y - 1¹/₃ = y + ¹/₇ - y - y ¹/₁₂y - 1¹/₃ = ¹/₇ + 1¹/₃ + 1¹/₃ 12 · ¹/₁₂y = 1¹⁰/₂₁ · 12 y = 17⁵/₇