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Johnny Pittman
Mathematics
28 May, 22:49
What is 2x-3y=-1
y=x-1
+2
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2
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Ahmad Ortega
28 May, 23:16
0
2x - 3y = - 1
y = x - 1
2x - 3y = - 1
2x - 3 (x - 1) = - 1
2x - 3 (x) + 3 (1) = - 1
2x - 3x + 3 = - 1
-x + 3 = - 1
- 3 - 3
-x = - 4
-1 - 1
x = 4
y = x - 1
y = 4 - 1
y = 3
(x, y) = (4, 3)
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Derek Flowers
28 May, 23:17
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If you're looking for the solution to the system of equations, here's how we solve using substitution
We know that y = x - 1, so we can plug that into the first equation giving
2x - 3 (x-1) = - 1
Now distribute the 3 giving 2x - 3x + 3 = - 1. After combining like terms we get - x + 3 = - 1. Now subtract 3 from both sides, - x = - 4, and multiply both sides by - 1 to make x positive. x = 4
Now we can plug that into the second equation to get y
y = x - 1, and we know that x = 4, so y = 4 - 1, y = 3. The solution is (4, 3)
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