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sergejj [24]
3 years ago
14

3x + 4y = 5 X- 3y = -7 Solve by substitution

Mathematics
1 answer:
weeeeeb [17]3 years ago
7 0
X = 3y - 7
3x + 4y = 5

3(3y - 7) + 4y = 5
9y - 21 + 4y = 5

13y - 21 = 5

13y = 26

y = 2

x - 3(2)= -7

x - 6 = -7

x = -1

(-1, 2)
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