3,5×(х+2 1/4) =14, (1 3/4 +х)÷1,9=2,5; (7,1-х)÷3,6=1 1/2

3,5*(х+2 1/4)=14х+2 1/4=14/3,5х+2 1/4=4х=4-2 1/4х=3 4/4-2 1/4х=1 3/4(1 3/4+х)/1,9=2,51 3/4+х=2,5*1,91 3/4+х=4,75х=4,75-1,75х=3(7,1-х)/3,6=1 1/27,1-х=1,5*3,67,1-х=5,4х=7,1-5,4х=1,7