Question

4分之y等于2分之1

4-2分之1y小于等于2分之1y,3分之2y+4大于等于y
x-3（x-2)小于等于4,4分之1-2x小于1-x

Answer 1

4-2分之1y≤2分之1y,
两边同乘以2,得
8-y≤y
-y-y≤-8
-2y≤-8
y≥4
3分之2y+4≥y
两边同乘以3,得
2y+4≥3y
2y-3y≥-4
-y≥-4
y≤4
x-3（x-2)≤4,
x-3x+6≤4
-2x≤-2
x≥1
4分之1-2x＜1-x
两边同乘以4得,
1-2x＜4-4x
-2x+4x＜4-1
2x＜3
x＜3/2