g = carbs in one glass of milk
b = carbs in a snack bar
in this, we can simply multiply by -2 at the bottom to get a -4g, and thus "eliminate" the g-variable
x > 1.3
step by step:
step 1: simplify both sides of the inequality.
step 2: add 1.9x to both sides.
step 3: subtract 8.5 from both sides.
step 4: divide both sides by 1.
1x/1 > 1.3/1