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×=7-4
×=3
2. ×-1 =3
×=3+1
×=4
3.2y+5 = y
5 = y-2y
-y = 5
y = -5
4.5p=4p-10
5p-4p=-10
p=-10
5.6×+5 = 5×-2
6×-5×= -2-5
×=-7
6.3z-7=2z+7
3z-2z=7+7
z=14
7.3(2×+4) = 2(×-4)
6×+12 = 2×-8
6×-2× = -12-8
4× = -20
× = -20/4
× = -5