Use the substitution method to solve this system.
y = 2x+4
3x+y = 9
2 answers:
Answer:
x = 1, y = 6
Point: (1, 6)
Step-by-step explanation:
y = 2x + 4
3x + y = 9
Since it’s saying that y = 2x + 4, substitute y for y = 2x + 4 in the second equation.
3x + 2x + 4 = 9
Add 3x + 2x (combining like terms)
5x + 4 = 9
Subtract 4 from 9
5x = 5
Solve for x
x = 1
Use x in the first equation.
y = 2x + 4
y = 2(1) + 4
y = 2 + 4
y = 6
Therefore x = 1 and y = 6
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Check if the work is correct!
y = 6
x = 1
6 = 2(1) + 4
6 = 2 + 4
6 = 6
3(1) + (6) = 9
3 + 6 = 9
9 = 9
Answer:
x = 1; y=6
Step-by-step explanation:
y = 2x +4
3x + y = 9
Substitute 2x+4 for y in 3x+y = 9
3x + y = 9
3x + 2x+4 = 9
5x + 4 = 9
5x = 9-4
5x = 5
5x/5 = 5/5
x = 1
Substitute 1 for x in y = 2x +4
2(1) + 4
2 + 4
= 6
Answered by Gauthmath
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