x + y = 6
x - y = 4 Add the equations together. This will eliminate the 'y' terms.
2x.....= 10 : x = 5
By substituting for 'x' in either original equation enables y to be determined.
5 + y = 6 : y = 6 - 5 = 1
x=12 because 12 over 6 is 2,and 2 plus 4 is 6.
x=6
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4 x 6 = 24 lieng
x = 2y = 4
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6x+4 = x+12+4x-6 6x-x-4x = 12-6-4 x = 2
2/3 +x= 4/6 4/6+x=4/6 x=0
x + 4 = 6 x = 6 - 4 x = 2
10-4=6
This is not Calculus. 6 + (2*4 = 8) = 14.
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