4,5=3I2x+0.7I
1.5=I2x+0.7I
2x₁+0.7=1.5
2x₁=0.8
x₁=0.4
2x₂+0.7=-1.5
2x₂=-2.2
x₂=-1.1
6I3x-3.5I=15
I3x-3.5I=2.5
3x₁-3.5=2.5
3x₁=6
x₁=2
3x₂-3.5=-2.5
3x₂=1
x₂=1/3
18=2I5+0.8xI
9=I5+0.8xI
5+0.8x₁=9
0.8x₁=4
x₁=5
5+0.8x₂=-9
0.8x₂=-14
x₂=-17.5
4.5I7-1.5xI=18
I7-1.5xI=4
7-1.5x₁=4
1.5x₁=3
x₁=2
7-1.5x₂=-4
1.5x₂=11
x₂=7 1/3