Question

HELP! Amber was asked to solve the following inequality and show all of her work. She made an error when solving.

Answer 1

Amber did wrong at the second and third step : She completely simplify both sides but she has to minus 3.5 twice on the left side in order to do so. But instead, she just make them gone.

Work :
$2x-3.5\geq 10.5 - > 2x\geq 14 - > x\geq 7$