SOLUTION: Linear equations w/ substitution . . . . y=3x and x+y=8

Question 282517: Linear equations w/ substitution . . . .
y=3x and x+y=8
Answer by oberobic(2304) (Show Source): You can put this solution on YOUR website!
y=3x
x+y = 8
.
substitute y=3x into the second equation
x+y = 8
x + 3x= 8
4x = 8
x = 2
.
substitute x=2 into the first equation
.
y = 3(2) = 6
.
check by substituting x=2 and y=6 into the second equation
.
x+y = 8??
2 + 6 = 8
correct
.
Answer:
x = 2
y = 6
.
Done.
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