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Jazlene Baldwin
Mathematics
12 January, 23:58
Solve
2x-3y=-4
5x+7y=1
+2
Answers (
1
)
Konnor Sanders
13 January, 00:27
0
x = - 25/29, y = 22/29
Step-by-step explanation:
Solve the following system:
{2 x - 3 y = - 4 | (equation 1)
5 x + 7 y = 1 | (equation 2)
Swap equation 1 with equation 2:
{5 x + 7 y = 1 | (equation 1)
2 x - 3 y = - 4 | (equation 2)
Subtract 2/5 * (equation 1) from equation 2:
{5 x + 7 y = 1 | (equation 1)
0 x - (29 y) / 5 = (-22) / 5 | (equation 2)
Multiply equation 2 by - 5:
{5 x + 7 y = 1 | (equation 1)
0 x+29 y = 22 | (equation 2)
Divide equation 2 by 29:
{5 x + 7 y = 1 | (equation 1)
0 x+y = 22/29 | (equation 2)
Subtract 7 * (equation 2) from equation 1:
{5 x+0 y = (-125) / 29 | (equation 1)
0 x+y = 22/29 | (equation 2)
Divide equation 1 by 5:
{x+0 y = (-25) / 29 | (equation 1)
0 x+y = 22/29 | (equation 2)
Collect results:
Answer: {x = - 25/29, y = 22/29
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