Question

2x + 1 - 7x + 1 = -2x + 1 + 7x​

Answer 1

$2x+1-7x+1=-2x+1+7x$

$2x+1-7x+1-1=-2x+1+7x-1$

$2x-7x+1=-2x+7x$

$-5x+1=-2x+7x$

$-5x+1=5x$

$-5x+1-1=5x-1$

$-5x=5x-1$

$-5x-5x=5x-1-5x$

$-10x=-1$

$\dfrac{-10x}{-10}=\dfrac{-1}{-10}$

$x=\dfrac{1}{10}$