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

Substitution..... please help ((: y=2x x+3y=21
asked 34.2k views
4 votes
Substitution..... please help ((:

y=2x
x+3y=21

asked
User Lucas Silva
by
8.5k points

1 Answer

3 votes
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
answered
User Eterm
by
8.2k points
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