jeph wiehgs 6.7kg.His brother john 2 times as heavy while their older sister is twoce as heavy than jeph and jon combined.How much does their older sister weigh?
with step by step explanation
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Answer:
26.8kg.
Step by step explanation:
1st step
6.7×2=13.4
since 13.4 the combined wiegh of jeph and jon.
then there sister is twice as heavy wiegh as combined jeph and jon weigh so..
13.4 × 2.
2nd step.
13.4×2=26.8 .
Answer:
28.8 kg
Step-by-step explanation:
cause 6.7×2=13.4
and13.4×2=28.6