Question

1) 2 (x+1,2)=2,7-x
2)7/9x-5/18x=-3

Answer 1

1) 2(x+1,2)=2,7-x
2x+2,4=2,7-x
2x+x=2,7-2,4
3x=0,3
x=0,3:3
x=0,1

2) $\frac{7}{9} x-\frac{5}{18} x=-3$
$\frac{14x-5x}{18}=-3$
$\frac{9x}{18}=-3$
9x=-3*18
9x=-54
x=-54:9
x=-6

Answer 2

1.
2(х+1,2) = 2,7-х;
2х+2,4 = 5,7-х;
2х+х = 5,7-5,4;
3х = 0,3;
х = 0,1
2.
7/9х-5/18х=-3;
14/18х-5/18/х=-3;
9/18х=-3;
0,5х=-3;
х = - 6