You can
put this solution on YOUR website!they can be confusing at times cant they.
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try to start with the unknowns , it may help you.
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let the cost of the garden table and bench be g and b, respectively
:
g+b=750.......eq 1
g=2b..........eq 2
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lets take the value of g which is 2b from eq 2 and plug it into every occurence of g in eq 1
:
2b+b=750
:
3b=750
:

dollars-cost of bench
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incidentally that would mean that the garden table cost 500(750-250).