adri66
adri66
30-01-2018
Mathematics
contestada
Solve the system of linear equations by substitution
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meredith48034
meredith48034
02-02-2018
x= 5y + 1
-2x + 9y = -1
-2(5y + 1) + 9y = -1
-10y - 2 + 9y = -1
-y - 2 = -1
-y = 1
y = -1
x + 5 = 1
x = -4
(-4, -1)
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