Question

0,5•(4+икс)-0,4•(икс -3)=2,5

Answer 1

0.5(4+x)-0.4(x-3)=2.5;
2+0.5x-0.4x+1.2=2.5;
0.5x-0.4x=2.5-1.2-2;
0.1x=-0.7;
x=-7