z equals 7
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6z + 28 = 12z + 10 18 = 6z 3 = z
If 6z=17, divide both sides by 6 z=17/6
-6z + 16 = 52 subtract 16 from each side -6z = 36 divide by -6 z = -6
6z - 3 = 0
-6z + 2 = 3z + 4z + 28 Add 6z to both sides: 2 = 3z + 4z + 28 + 6z = 28 + 13z Subtract 28 from both sides: - 26 = 13z Divide both sides by 13: -2 = z