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Danielle Warner
Mathematics
26 January, 10:11
Solve each system using either 1
1. 5x - y = 12
3x + y = 4
+4
Answers (
1
)
Dominic Booker
26 January, 10:34
0
x = 2, y = - 2
Step-by-step explanation:
Solve the following system:
{5 x - y = 12 | (equation 1)
3 x + y = 4 | (equation 2)
Subtract 3/5 * (equation 1) from equation 2:
{5 x - y = 12 | (equation 1)
0 x + (8 y) / 5 = (-16) / 5 | (equation 2)
Multiply equation 2 by 5/8:
{5 x - y = 12 | (equation 1)
0 x+y = - 2 | (equation 2)
Add equation 2 to equation 1:
{5 x+0 y = 10 | (equation 1)
0 x+y = - 2 | (equation 2)
Divide equation 1 by 5:
{x+0 y = 2 | (equation 1)
0 x+y = - 2 | (equation 2)
Collect results:
Answer: {x = 2, y = - 2
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