Question

va rog urgent..punctele:q..r..s..si u..urgent

Answer 1

q)Aducem,la,numitor,comun(6)
4+3x+3=30-4+x
3x+7=26+x
2x=19
x=19/2

r)Aducem,la,numitor,comun(15)
18x-15x=5x+8x
3x=13x-ecuatie,incompatibila

s)1/4{1/4[1/4(4+x)/4)+4]+1}+4=5
1/4{1/4[1/4(4+x)/4)+4]+1}=1
1/4{1/4[(4+x)/16+4]+1}=1
1/4{1/4[(4+x+64)/16]+1}=1
1/4[1/4(x+68)/16+1]=1
1/4[(x+68)/64+1]=1
1/4(x+68+64)/64=1
(x+132)/256=1
x+132=256
x=124

u)37/3:{[11/4:(5/3+15x/8)]·8/11+5/3}=5
37/3:{[11/4:(40+45x)/24]·8/11+5/3}=5
37/3:{[11/4·24/(40+45x)]·8/11+5/3}=5
37/3:{[11·6/(40+45x)]·8/11+5/3}=5
37/3:{[66/(40+45x)]·8/11+5/3}=5
37/3:[6·8/(40+45x)+5/3]=5
37/3:[48/(40+45x)+5/3]=5
48/(40+45x)+5/3=37/15
48/(40+45x)=37/15-5/3
48/(40+45x)=(37-25)/15
48/(40+45x)=12/15
12(40+45x)=720
40+45x=60
45x=20
x=20/45=4/9