Tables and chairs

The cost of 4 tables and 3 chairs is $225, and 3 tables and 4 chairs cost $195. Find the cost of 2 chairs and 1 table.

Correct answer:

x =  75 USD

Step-by-step explanation:

4a+3b=225 3a+4b=195  4 a+3 b=225 3 a+4 b=195  4a+3b=225 3a+4b=195  Row243 Row1Row2 4a+3b=225 1.75b=26.25  b=1.7526.25=15 a=42253b=42253 15=45  a=45 b=15  x=2 b+a=2 15+45=75 USD

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