3 – (–3) + 7 – 4 =
3 – (–3) + 7 – 4 = 3 + 3 + 7 - 4 = 6 + 7 - 4 = 13 - 4 = 9
Updated 12/12/2017 2:12:30 PM
Edited by Masamune [12/12/2017 2:11:49 PM]
g
Rating
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3 – (–3) + 7 – 4
= 3 + 3 + 7 - 4
= 6 + 7 - 4
= 13 - 4
= 9

Solve the following system by any method. –3x + 5y = –9 4x + 8y = 12
Updated 12/13/2017 9:04:17 AM
–3x + 5y = –9
4x + 8y = 12

(–3x + 5y = –9) * (4)
-12x + 20 = -36
(4x + 8y = 12) * (3)
12x + 24y = 36

(-12x + 20 = -36) + (12x + 24y = 36)
44y = 0
y = 0

–3x + 5(0) = –9
-3x = -9
x = -9/-3
x = 3

Solution set: (3, 0)
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