Question

Решите уравнение:
1) 0,4(x-3)-1.6=5(0.1x-0.5)
2)1.5(2x-5)+2x=5(0.5x-1.5)-10
3)2/3(1 1/2x+3/5)-4/5(5/12x-1/2)=1 3/5

Answer 1

1) 0.4x -1.2 -1.6= 0.5x- 2.5
-0.1x= 0.3
-x=3
x=-3
ответ:-3
2) 3x - 7.5 + 2x= 2.5x - 7.5 - 10
2.5x= -10
x=-4
otvaet:-4
3) 1x + 2/5 -1/3x+2/5= 8/5
2/3x= 4/5
x=6/5
otvet 6/5