SOLUTION: this is a question of solving a system of equations with substitution, x+y=24 y=7x

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Question 943856: this is a question of solving a system of equations with substitution,
x+y=24
y=7x
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

x%2By=24...eq.1
y=7x.....eq.2
______________
x%2By=24...eq.1 substitute 7x for y
x%2B7x=24
8x=24
x=24%2F8
highlight%28x=3%29

y=7x.....eq.2 substitute 3 for x
y=7%2A3
highlight%28y=21%29


+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+30%2C+7x%2C+-x%2B24%29+