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Solve the system by substitution x+5y=4 2x+10y=8
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5 votes
Solve the system by substitution
x+5y=4
2x+10y=8

User Danbruegge
by
7.5k points

2 Answers

4 votes
Multiply the first equation by 2, that gives you the second.
Any x,y works.
User Arussinov
by
7.8k points
3 votes
x+5y=4
2x+10y=8

x=-5y+4

2(-5y+4) +10y=8 substituted in the equation for x
-10y+8+10y=8 distributed
8=8 combined like terms (-10y+10y)
0=0

MANY SOLUTIONS/INFINITE
User DDan
by
7.7k points
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