1)х=5 1/3-1 3/4
х=(5*3+1)/3-(4+3)/4=16*4/(3*4)-7*3/(4*3)=(64-21)/12=43/12=(36+7)/12=3 7/12
2)х=3 1/2+4 5/8=(3*2+1)2+(4*8+5)/8=7*4/(2*4)+37/8=(28+37)/8=65/8=(64+1)/8= 8 1/8
3)х=1 19/22+3 4/33=(22+19)/(2*11)+(3*33+4)/(3*11)= 41*3/(2*3*11)+103*2/(2*3*11)=(123+206)/66=329/66=(264+65)/66=4 65/66
4)4,75-х+1/12=1/3
х=475/100+1/12-1/3= 19*25/(4*25)+1/12-1/3=19*3/(4*3)+1/12-4/(4*3)=(57+1-4)/12=54/12=(48+6)/12=4 6/(2*6)=4 1/2=4,5