Question

几道数学题解方程 3（4x+5）=2（4x+3）+1 y+2/4-2y-1/6=1 3/2【2（x-1/2）+2/3】=

Answer 1

1.3（4x+5）=2（4x+3）+1

12x+15=8x+6+1

4x=-8

x=-2

2.y+2/4-2y-1/6=1

4y-2y^2+2=7/6(4-2y)

12y-6y^2+6=14-7y

6y^2-19y+8=0

(2y-1)(3y-8)=0

y=1/2或8/3

3.3/2【2（x-1/2）+2/3】=5x

3/2（2x-1+2/3）=5x

3x-1/2=5x

2x=-1/2

x=-1/4