1) (x+2.3)*0.2=0.7 3) 4.2x+8.4=14.7
0.2x+0.46=0.7 4.2x=14.7-8.4
0.2x=0.7-0.46 4.2x=6.3
0.2x=0.24 x=6.3:4.2
x=0.24:0.2 x=1.5
x=1.2
2) (2.8-x):03x=5 4) 0.39:x-0.1=0.16
2.8-x=5*0.3x 0.39:x=0.16+0.1
2.8-x=1.5x 0.39:x=0.26
2.8=1.5x+x 0.39=0.26*x
2.8=2.5x 0.26x=0.39
x=2.8:2.5 x=0.39:0.26
x=1.12 x=1.5
(2 5/6 + 2 2/9) : 3 1/4 - 2/9 = 1 1/3
1) 2 5/6 + 2 2/9 = 273/54 = 5 3/54
2) 5 3/54 : 3 1/4 = 4/19 = 1 5/9
3) 1 5/9 - 2/9 = 1 3/9 = 1 1/3