1)
1.9t-0.54=0.22
1.9t=0.54+0.22
1.9t=0.76
t=0.76:1.9
t=0.4
2) 2.9z+2.65=7
2.9z=-2.65+7
2.9z=4.35
z=4.35:2.9
z=1.5
1)
1.9t-0.54=0.22
1.9t=0.54+0.22
1.9t=0.76
t=0.76:1.9
t=0.4
2) 2.9z+2.65=7
2.9z=-2.65+7
2.9z=4.35
z=4.35:2.9
z=1.5