tcuff2002
tcuff2002
26-01-2017
Mathematics
contestada
5x+y=27 y=4x using substitution method
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LukesTuke
LukesTuke
26-01-2017
5x + y = 27
substitute: 5x + 4x = 27
combine: 9x = 27
divide (by 9): x = 3
Answer Link
Apocrophon
Apocrophon
26-01-2017
Substitute 4x for y, and solve for x;
5x + (4x) = 27
9x = 27
x = 3
Substitute 3 in for x in the first equation and solve for y;
5(3) + y = 27
15 + y = 27
y = 12
Answer Link
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