Question 1122277
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2 LINEAR EQUATIONS IN 2 UNKNOWNS or SIMULTANEOUS LINEAR EQUATIONS IN 2 UKNOWNS 
in 5 years, jose would be twice the age of Ana. Five years ago, jose was 4 times as old as ana. How old is Jose now?
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{{{system(j+5=2(a+5),j-5=4(a-5))}}}