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Lorenzo Stuart
Mathematics
23 September, 00:20
X+4y=30 system by substitution
X-2y=0
+2
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1
)
Bridger Mclean
23 September, 00:43
0
x=10, y=5
Step-by-step explanation:
For substitution, you always want to get the variable alone. The second equation (x-2y=0) will be easier to substitute into the first equation.
x-2y=0
x=2y
You can substitute 2y as x on the first equation (x+4y=30).
2y+4y=30
6y=30
y=5
Plug y=5 into any equation.
x+4 (5) = 30
x+20=30
x=10
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