Answer :
3(y - ¹/₇) - y = 4(2 - y)
3(y) + 3(⁻¹/₇) - y = 4(2) + 4(-y)
3y + (⁻³/₇) - y = 8 + (-4y)
3y - ³/₇ - y = 8 - 4y
3y - y - ³/₇ = 8 - 4y
2y - ³/₇ = 8 - 4y
+ 4y + 4y
6y - ³/₇ = 8
+ ³/₇ + ³/₇
6y = 8³/₇
6 6
y = 1¹⁷/₄₂
3(y) + 3(⁻¹/₇) - y = 4(2) + 4(-y)
3y + (⁻³/₇) - y = 8 + (-4y)
3y - ³/₇ - y = 8 - 4y
3y - y - ³/₇ = 8 - 4y
2y - ³/₇ = 8 - 4y
+ 4y + 4y
6y - ³/₇ = 8
+ ³/₇ + ³/₇
6y = 8³/₇
6 6
y = 1¹⁷/₄₂