1)3,4*x-4=4.8-x
3.4*x+x=4.8+4
4.4*x=8.8
x=2
2)2*x+7=5.5+x
2*x-x=5.5-7
x=-1.5
3)5-3*x=2*x-8
5+8=2*x+3*x
5*x=13
x=13/5
4)9.5*x+2=5.7*x-5.6
9.5*x-5.7*x=-5.6-2
3.8x=-7.6
x=2
5)1.5*x+8=3.1x+16
3.1*x-1.5*x=8-16
1.6*x=8
x=5
6)2.9*x+7.4=x+1.7
2.9*x-x=1.7-7.4
1.9*x=-5.7
x=-3