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Nookie1986 [14]
3 years ago
12

Substitution..... please help ((: y=2x x+3y=21

Mathematics
1 answer:
lutik1710 [3]3 years ago
7 0
Y = 2x

x + 3y = 21

x + 3(2x) = 21

x + 6x = 21

7x = 21

7x/7 = 21/7

x = 3

2(3) = y
y = 6

hope this helps
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