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Areli Cabrera
Mathematics
17 December, 20:57
Solve the system of equations. y = 9x y = 2x + 63
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Serena Lindsey
17 December, 21:16
0
y=2x+7
y=9x+8
From (1),
x = (y-7) / 2
Substituting value of x in eqn (2) we get,
y = 9. (y-7) / 2 + 8
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Micaela
17 December, 21:18
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Y=9x and
y=2x+63
subsitute 9x for y
9x=2x+63
minus 2x from both sides
9x-2x=2x-2x+63
7x+0=63
7x=63
divide both sides by 7
7x/7=63/7
(7/7) x=9
(1) x=9
x=9
sub back to find y
y=9x
y=9 (9)
y=81
(x, y)
(9,81)
the solution is (9,81)
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