N357. 7. Найдите решение уравнения.
a) x + x = 15;
в) 1,2x + 0,3x = 12;
д) 3x - x = 1;
6) 3x + x = 3;
г) 2x + 1 x = 24;
e) 2,4x - 0,2x = 11;
-
=
x) 5 x − 2x = 2,5;
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3) 25x – 0,5x = 0,5;
и) 0,2х + x + 1,5х = 3,4; к) 12х - x + 3x = 3,5.
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