m=3j m+7=2(j+7) two equations in two unknowns.solve by substitution of 3j for m in the second equation. 3j+7=2j+14 -2j=-2j --------------- j+7=14 -7=-7 --------------------- j=7

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I am a retired math professor emeritus. I have taught math at all levels with a specialty in probability. I have taught at Indiana University, Virginia Commonwealth University, and Northeastern Illinois University. I have tutored in mathematics for most of my life either as a private tutor or as a part of my job at the various colleges where I was a faculty member. I have always had excellent student and peer reviews on my classroom efforts.

Math:

ACT Math, Algebra 1, Algebra 2, Calculus, Differential Equations, Geometry, Prealgebra, Precalculus, Probability, SAT Math, Statistics, Trigonometry
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Algebra 1, Algebra 2, Calculus, Geometry, Prealgebra, Precalculus, SAT Math, Statistics
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ACT Math, SAT Math
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Statistics
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m=3j m+7=2(j+7) two equations in two unknowns.solve by substitution of 3j for m in the second equation. 3j+7=2j+14 -2j=-2j --------------- j+7=14 -7=-7 --------------------- j=7

no.consider (x+y)+(-x+-y)=0 not a binomial

110+55h=75h 110=20h h=5.5hours

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