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How do you solve linear equations in three variables? (answer)

Hi Courtnee, It is a good question to cast doubt if there is a unique solution to your linear system (we call it linear because all three equation you listed here are in linear form , i.e ax+by+cz=k where a,b,c,k are numbers and x,y,z are unknows). The basic idea to solve a linear...

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The ordering of algebraic operations

When both writing down and reading the algebraic expressions, the binary operation (including addition+, subtraction-, multiply*, divide/, exponential^) follow a conventional order: 0) Parenthesis, including {}, [], () 1) Exponent, multiply and divide 2) Addition and subtraction The ordering is 0)>1)>2). Then there is no ordering within each group, eg multiply... read more

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why 6/5x5/9 is 2/3 (answer)

Hi Ruben, In order to do fractions, you first need to understand that order of algebraic operation.  When both writing down and reading the algebraic expressions, the binary operation (including addition+, subtraction-, multiply*, divide/, exponential^) follow a conventional order: 0)...

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how do I work this problem 3+(8-2)*6 (answer)

When both writing down and reading the algebraic expressions, the binary operation (including addition+, subtraction-, multiply*, divide/, exponential^) follow a conventional order:   0) Parenthesis, including {}, [], () 1) Exponent, multiply and divide 2) Addition and subtraction   The...