1) -3.4x=12.07
x = 12.07/(-3.4)
x = -3.55
2)(5.6-8x):4=1.2
5.6-8x = 4*1.2
5.6-8x = 4.8
8x =5.6-4.8
8x = 0.8
x =0.1
3)(0.35-у):0.05=6
0.35-у = 6*0.05
0.35-у = 0.3
y = 0.03
4)5(x+2)=4(3-x)+7
5x+10= 19-4x
9x=9
x=1
1) -3.4x=12.07
x = 12.07/(-3.4)
x = -3.55
2)(5.6-8x):4=1.2
5.6-8x = 4*1.2
5.6-8x = 4.8
8x =5.6-4.8
8x = 0.8
x =0.1
3)(0.35-у):0.05=6
0.35-у = 6*0.05
0.35-у = 0.3
y = 0.03
4)5(x+2)=4(3-x)+7
5x+10= 19-4x
9x=9
x=1