A = 4B
A - B = 9
Substitute 4B in place of A in the second equation.
A - B = 9
4B - B = 9
3B = 9
Solve for B. Once you have the value of B, use the top equation (A = 4B) to get the value of A
Mikk C.
asked • 03/26/14Solve with Substitution method
A=4B
A-B=9
(Same problem)
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