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14z + 9 + 4z - 3 - 7z = 28
We simplify the equation to the form, which is simple to understand
14z+9+4z-3-7z=28
We move all terms containing z to the left and all other terms to the right.
+14z+4z-7z=+28-9+3
We simplify left and right side of the equation.
+11z=+22
We divide both sides of the equation by 11 to get z.
z=2
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