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X-2 =6 X-2=-6 HP {8,-4}
X=6+2 X=-6+2
X=8 X=-4
b. I 3X -5 I = 7
3X-5=7 3X-5=-7
3X=7+5 3X=-7+5
3X=12 3X=-2
X=4 X=-2/3 HP { 4,-2/3}