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Twice the sum of difference if a number z and 12 is equal to 10

its not solving for z its just writing the inequality or equation

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Lorraine T. | "Math and Science tutor for all ages" "Math and Science tutor for all ages"
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2(z-12)=10 i think you may be misquoting problem as there is no sum of diffetence. Sum means addition and difference is subtraction.