Answer
27x^22-3x-1
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Step-by-step explanation:
Answer:
70 cubic cenimeters
Step-by-step explanation:
please give brianly!
ANSWER
The solution is 
EXPLANATION
We want to solve the simultaneous equations

and
.
We substitute equation (2) in to equation (1), to obtain

This has now become a linear equation in a single variable
.
We solve for x by grouping like terms.


We divide through by negative 3 to get;
.
Hence, the solution is 