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Mathematics
Caylee Kidd
20 February, 16:02
4x - 2y = 7
X + 2y = 3
What are x and y?
+5
Answers (
2
)
Twinkly
20 February, 16:35
0
{x, y} = {2,1/2}
Step-by-step explanation:
Solve by Substitution:
1. Solve equation [2] for the variable x
[2] x = - 2y + 3
2. Plug this in for variable x in equation [1]
[1] 4• (-2y+3) - 2y = 7
[1] - 10y = - 5
3. Solve equation [1] for the variable y
[1] 10y = 5
[1] y = 1/2
By now we know this much:
x = - 2y+3
y = 1/2
4. Use the y value to solve for x
x = - 2 (1/2) + 3 = 2
Solution:
{x, y} = {2,1/2}
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Lyla Maddox
20 February, 19:43
0
4x - 2y = 7
x + 2y = 3
5x = 10
x=2 and y=0
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