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When given the equations x-y=-1, 2y-x=27, x+y =11 how would you use row echelon form to get to the answer (5,6)? Do men from Mars have green skin and antennae? A man is 5 times as old as his son 2 years ago the sum of the squares of their age was 114 find the present age of son?answer is 7? MATH HELP????? Can someone help me find the equation to the graph below? Math help please? I cant find the equation for this graph?