Answer:
92.
Step-by-step explanation:
By proportion the mass of zinc = (345/ 15) * 4
= 92.
Answer:
Exact Form:
x= -23/2
Decimal:
x= -11.5
Mixed Number:
x= -11/2
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable
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