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

(720+e)*501=365730
720+e=365730:501
720+e=730
e=730-720
e=10
(720+10)*501=365730

(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