數學練習/等量公理

1. 4x+15=3 求x值
2. (-1)-6x=-19 求x值
3. 8y-11=1 求y值
4. $x-(-{\frac {1}{2}})={\frac {1}{2}}$ 求x值
5. ${\frac {1}{4}}y+5={\frac {3}{8}}y$ 求y值
6. ${\frac {5x-4}{6}}={\frac {2x-1}{4}}$ 求x值
7. 化簡 24x+13y-5x+25y=19
8. 化簡 -50x+34y+101x-17y=34
9. 化簡 3(-2x+3y)+2x+3y=8
10. 化簡 $-6(x-{\frac {1}{4}}y+{\frac {1}{12}})=-{\frac {1}{2}}$