04(×-3)=0,5(4+×)-2,5

Question

04(×-3)=0,5(4+×)-2,5

Answer 1

0.4х-1.2=2+0.5х-2.5
0.4х-0.5х=-0.5+1.2
-0.1х=0.7
х=0.7:(-0.1)
х=-7
проверка:
0.4(-7-3)=0.5(4-7)-2.5
0.4*(-10)=0.5*(-3)-2.5
-4=-1.5-2.5
-4=-4