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3z -3z -4 = 32 + 7z - 3z
-4 = 32 + 4z
-4 - 32 = 32 - 32 + 4z
-36 = 4z
-36÷4 = z
-9 = z
semoga membantu..
-4z=36
z=36/-4
z=-9