SOLUTION: Solve the system of equations using the substitution method. y=3x+1, 3y-7x=9
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Question 511319: Solve the system of equations using the substitution method. y=3x+1, 3y-7x=9
Answer by oberobic(2304) (Show Source): You can put this solution on YOUR website!
y=3x+1.
.
substitute for y
.
3(3x+1) -7x = 9
9x +3 -7x = 9
2x = 6
x = 3
.
substitute for x
.
y =3(3) +1
y = 10
.
check using 3y-7x = 9
.
3y -7x = ??
3(10) -7(3) = 30 -21 = 9
correct
.
Answer: x=3, y=10
.
Done.
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