SOLUTION: Solve and then check the system of equations by substitution method. SHOW ALL WORK AND ALL STEPS 4a+7b=2 5a+b=-13

Algebra ->  Linear-equations -> SOLUTION: Solve and then check the system of equations by substitution method. SHOW ALL WORK AND ALL STEPS 4a+7b=2 5a+b=-13      Log On


   



Question 969199: Solve and then check the system of equations by substitution method. SHOW ALL WORK AND ALL STEPS
4a+7b=2
5a+b=-13

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
4a+7b=2
5a+b=-13
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Solve the 2nd eqn for b
b = -5a - 13
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Sub for b in the 1st equation.