(720+е)*501=365730--------------------------------5t+30-2t=42--------------------------------36*(x-3)=10-2*(x+2)--------------------------------Решить всё с проверкой

(720+ е)×501 =365730 360720 + 501е=365730 501е = 365730 -360720 501е =5010 Е = 5010 ÷ 501 Е= 10 (720+10) ×501 =365730 360720 +5010 =365730 5t +30-2t=42 3t=42-30 3t =12 T=12÷3 T=4 5×4 +30-2×4=42 20+30-8=42 36×(x-3)=10-2×(x+2) 36x-108 =10 -2x-4 36x+2x=10-4+108 38 x =114 X= 114÷38 X=3 36×(3-3)=10-2×(3+2) 36×0=10-10 0=0