`\color {blue} \text {_Namm_}`
`c, = 3 3/29-3 1/5+2 7/11-2 2/29+3 4/11`
`= (3 3/29- 2 3/29)+(2 7/11+3 4/11)-3 1/5`
`= 1+6-3 1/5=7-3 1/5=19/5`
`d, =-1/4*(152/11- (-68/11))`
`=-1/4*(152/11+68/11)`
`=-1/4*20 = -5`
`2,`
`a, 5/6+(5x+3/2) \div 8/15=2 1/12`
`(5x+3/2) \div 8/15=2 1/12 - 5/6`
`(5x-3/2) \div 8/15=5/4`
`5x-3/2=5/4*8/15`
`5x-3/2=2/3`
`5x=2/3-3/2`
`5x=-5/6`
`x= -5/6 \div 5`
`x= -1/6`
`b, 2/3(x+9/5)-3/10*(5x-1/3)=7/15`
`(2/3*x+2/3*9/5) - (3/10*5x - 3/10*1/3)=7/15`
`2/3*x+6/5 - 3/10*5x -1/10=7/15`
`-5/6 *x= - 5/6`
`x=(-5/6) \div (-5/6)`
`x=1`
`c, 3/5*x-1/2=7/10`
`3/5*x=7/10+1/2`
`3/5*x=6/5`
`x=6/5 \div 3/5`
`x=2`
`d, 1/5+4/5 \div x=-1`
`4/5 \div x=-1 - 1/5`
`4/5 \div x=-6/5`
`x=4/5 \div (-6/5)`
`x=-2/3`
2:
a: =>(5x+3/2)*15/8=25/12-5/6=25/12-10/12=15/12=5/4
=>5x+3/2=5/4*8/15=40/60=2/3
=>5x=2/3-3/2=4/6-9/6=-5/6
=>x=-1/6
b: =>2/3x+6/5-3/2x+1/10=7/15
=>-5/6x=-5/6
=>x=1
c: =>3/5x=7/10+1/2=12/10=6/5
=>x=2
d: =>4/5:x=-1-1/5=-6/5
=>x=-4/5:6/5=-4/5*5/6=-20/30=-2/3
