9z+8 = 3z-10
9z-3z = -10-8
6z = -18
z = -3
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It's 9z-7. because: you do the 8 times z first (8z) then add the z, (9z), then minus 7. 9z-7
89
244 plus 8 equals 252
40
Yes, -8 plus plus 3 equals -5. The "plus plus" is equivalent to a positive sign, so -8 plus (+3) equals -5.