討論:初中數學/算則練習/等量公理

1. 4x+15=3 求x值。ANS:x=-3
2. (-1)-6x=-19 求x值。 ANS:x=3
3. 8y-11=1 求y值。 ANS:$y={\frac {3}{2}}$
4. $x-(-{\frac {1}{2}})={\frac {1}{2}}$ 求x值。ANS:x=0
5. ${\frac {1}{4}}y+5={\frac {3}{8}}y$ 求y值。ANS:y=40
6. ${\frac {5x-4}{6}}={\frac {2x-1}{4}}$ 求x值。ANS:$x={\frac {5}{4}}$
7. 化簡 24x+13y-5x+25y=19 ANS:$y=-{\frac {x}{2}})+{\frac {1}{2}}$
8. 化簡 -50x+34y+101x-17y=34 ANS:y=-3x+2
9. 化簡 3(-2x+3y)+2x+3y=8 ANS:$y={\frac {x}{3}}+{\frac {2}{3}}$
10. 化簡 $-6(x-{\frac {1}{4}}y+{\frac {1}{12}})=-{\frac {1}{2}}$ ANS:y=4x