Решите уравнение. 1)х+18=7;2)-56-х=-29
ДАЮ 30 БАЛЛОВ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! СРОЧНО!!!!!!!!!!!!!!!!!!!!!!!!!!!! НАДО ЗАВТРА!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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x=7-18
x=-11
-11+18=7
Ответ:x=-11
2)-56-x=-29
x=-56+29
x=-27
-56-(-27)=-29
Ответ:x=-27