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Mathematics, 29.07.2019 18:10, wonderwonder2748
Frank tried to solve an equation step by step. \qquad\begin{aligned} -5& =5(d+4) \\ -5& =5d+20& \green{\text{step } 1} \\ 15& =5d& \blue{\text{step } 2} \\ 3& =d& \purple{\text{step } 3} \end{aligned} −5 −5 15 3 =5(d+4) =5d+20 =5d =d step 1 step 2 step 3 find frank's mistake.
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Frank tried to solve an equation step by step. \qquad\begin{aligned} -5& =5(d+4) \\ -5& =5d+...
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