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Original Question
two records and three tapes cost $31.three records and two tapes cost $29.find the total cost of each record and each tapeAsked by Kayle
Two records and three tapes cost $31. Three records and two tapes cost $29. Find the cost of each records and each tape.
Answers
Answered by
DrBob222
2R + 3T=31
3R+2T=29
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Two equations and two unknowns. Solve the two equations simultaneously. Post your work if you get stuck.
3R+2T=29
===================
Two equations and two unknowns. Solve the two equations simultaneously. Post your work if you get stuck.
Answered by
Kayle
is my answer correct?
T = 7
R = 5
?
T = 7
R = 5
?
Answered by
DrBob222
Yes, but you could check it.
(2*5)+(3*7)= 10 + 21 = 31 AND
(3*5)+(2*7) = 15+14=29 so both equations check.
(2*5)+(3*7)= 10 + 21 = 31 AND
(3*5)+(2*7) = 15+14=29 so both equations check.
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