Question

suppose charms a, b, d, and e have unequal weights. the charms balance on the scale as shown. what do you know about the weight of charm e?
e must weigh ______ grams.
(there is an image of a balance scale with charm a (1.5g), charm b (1.2g) on one side and charm d, charm e (2.4g?) on the other side, and a 1.8g weight? (partially visible))

Explanation:

Step1: Calculate total weight of A+B

$1.5 + 1.2 = 2.7$ grams

Step2: Set equal to D+E total

$2.7 = 2.4 + E$

Step3: Solve for E's weight

$E = 2.7 - 2.4$

Answer:

0.3 grams