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Mr.Melvin starts discussing the following techniques
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| these are the techniques: step one,Try to choose the equation where the coefficient of a variable is 1. | |
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Mr.Ted seems to be quiet when he listens to Mr. Melvin
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| our example is 3x + 2y = 2 (equation 1) y + 8 = 3x what we need to do is Choose equation 2 and isolate variable y y = 3x – 8 (equation 3) | |
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| step two, From equation 3, we know that y is the same as 3x – 8, so We can then substitute the variable y in equation 1 with 3x – 8 3x + 2 (3x – 8) = 2 | |
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