Question

решите уравнение
2,1×+0,4=3,1×-(1,1×+0,4)+0,6

Answer 1

2.1x+0.4=3.1x-1.1x-0.4+0.6
2.1x+1.1x-3.1x=-0.4-0.4+0.6
0.2x=-0.2
×=-1