his number 240 (is question number 6 below)
looking carefully at the coefficients...
what do you notice?
how does it help?
what happens if you add the two equations?
what happens if you subtract them?
Tuesday, 25 January 2011
simultaneous equations with patterns
his number 240 (is question number 6 below)
looking carefully at the coefficients...
what do you notice?
how does it help?
what happens if you add the two equations?
what happens if you subtract them?
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