$$ \begin{aligned} 25 &= 35-2\cdot(1-4x)&& \text{simplify right side} \\[1 em]25 &= 35-(2-8x)&& \\[1 em]25 &= 35-2+8x&& \\[1 em]25 &= 8x+33&& \text{ swap the left and right side of the equation } \\[1 em]8x+33 &= 25&& \text{ move 33 to the right } \\[1 em]8x &= 25-33&& \\[1 em]8x &= -8&& \text{ divide both sides by $ 8 $ } \\[1 em]x &= -\frac{8}{8}&& \\[1 em]x &= -1&& \\[1 em] \end{aligned} $$

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