Question

12 + 3x – 7 = 46 – 7x + 8 + 3x

Answer 1

$12+3x-7=46-7x+8+3x$

$5+3x=46-7x+8+3x$

$5+3x=54-7x+3x$

$5+3x=54-4x$

$5+3x+4x=54$

$5+7x=54$

$7x=54-5$

$7x=49$

$x=\frac{49}{7}$

$x = 7$