Question

срочно, даю 15 баллов

Answer 1

9(х-1)=х+15 ==> 9х-9=х+15 ==> 9х-х=9+15 ==> 8х=24 ==> х=24:8 ==> х=3

(11х+14)-(5х-8)=25 ==> 11х+14-5х+8=25 ==> 11х-5х = -14-8+25 ==> 6х=3 ==> х=0.5

12-4(х-3)=39-9х ==> 8х-24=39-9х ==> 17х=63 ==> х=63:17

2(3х+5)-3(4х-1)=11,8 ==> 6х+10-12х+3=11,8 ==> -6х = -1,2 ==> х= -0.2

0.4(х-3)-1.6=5(0.1х-0.5) ==> 0.4х-1.2-1.6=0.5х-2.5 ==> 0.9х=1.2+1.6-2.5 ==> 0.9х=0.3 ==> х=0.9:0.3 ==> х=3