Question

Решите уровнен е 1) 7,1 +х= 4,2

Answer 1

Ответ:

х=4,2-7,1

х=-2,9

х=-29/10,х=-2 9/10

Answer 2

$7.1 + x = 4.2 \\ x = 4.2 - 7.1 \\ \boxed{x = - 2.9 }\\----------\\ 7.1 + ( - 2.9) = 4.2 \\ 7.1 - 2.9 = 4.2 \\ - 2.9 = - 2.9$