Question

a,1/3 .(x-2/5)=3/4      b, 7/3:(x-2/3)=4/5    c,1/3.(x-2/5)=4/5  d, 2/3.(x-1/2)-1/4.(x-2/5)=7/3   e,3/7 .(x-2/3)+1/2=5/4.(x-2)    f,1/2.(x-3)+1/3.(x-4)+1/4.(x-5)=1/5            g,[2/3.(x-1/2)-4/5]:(x-1/3)=21/5    h, {x-[1/2.(x-3)+11/5]}:(x-1/2)=3/5            i,x.(x-2/5)-(x+2).x+11/4=4/3

Answer 1

a: =>x-2/5=3/4:1/3=3/4*3=9/4

=>x=9/4+2/5=45/20+8/20=53/20

b: =>x-2/3=7/3:4/5=7/3*5/4=35/12

=>x=35/12+2/3=43/12

c: 1/3(x-2/5)=4/5

=>x-2/5=4/5*3=12/5

=>x=12/5+2/5=14/5

d: =>2/3x-1/3-1/4x+1/10=7/3

=>5/12x-7/30=7/3

=>5/12x=7/3+7/30=77/30

=>x=77/30:5/12=154/25

e: \(\Leftrightarrow x\cdot\dfrac{3}{7}-\dfrac{2}{7}+\dfrac{1}{2}-\dfrac{5}{4}x+\dfrac{5}{2}=0\)

=>\(x\cdot\dfrac{-23}{28}=\dfrac{2}{7}-3=\dfrac{-19}{7}\)

=>x=19/7:23/28=76/23

f: =>1/2x-3/2+1/3x-4/3+1/4x-5/4=1/5

=>13/12x=1/5+3/2+4/3+5/4=257/60

=>x=257/65

i: =>x^2-2/5x-x^2-2x+11/4=4/3

=>-12/5x=4/3-11/4=-17/12

=>x=17/12:12/5=85/144