$$ \begin{aligned} 24 &= -7+4(d-3)&& \text{simplify right side} \\[1 em]24 &= -7+4d-12&& \\[1 em]24 &= 4d-19&& \text{ swap the left and right side of the equation } \\[1 em]4d-19 &= 24&& \text{ move -19 to the right } \\[1 em]4d &= 24+19&& \\[1 em]4d &= 43&& \text{ divide both sides by $ 4 $ } \\[1 em]d &= \frac{43}{4}&& \\[1 em] \end{aligned} $$

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