Реши уравнения 1) (20+m) /2=26 2) (45-n) /3=10*3 3) (160+x)-40=300 4) 225 /(c+5=15

1. 20+m=26*2          3.160+x=300+40     20+m=52                  160+x=340     m=52-20                   x=340-160     m=32                         x=180 2. (45-n)/3=30          4. c+5=225/15     45-n=30*3                 c+5=15     45-n=90                     c=15-5     n=90-45                     c=10     n=45

(20+m)/2=26 20+m=26*2 20+m=52 m=52-20 m=32 ------------------- (20+32)/2=26   (45-n)/3=10*3 45-n=30*3 n=45-90 n=-45 -------------------- (45-(-45))/3=10*3   (160+x)-40=300 160+x=300+40 x=340-160 x=180 ------------------------ (160+180)-40=300   225/(c+5)=15 c+5=225/15 c+5=15 c=15-5 c=10 -----------------------  225/(10+5)=15