SpareChange
SpareChange SpareChange
  • 03-03-2018
  • Mathematics
contestada

2x-37=13 x+2y+-4
Linear Combination
Help please

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zrh2sfo
zrh2sfo zrh2sfo
  • 03-03-2018
Solve the following system:
{2 x - 37 = 13 | (equation 1)
{x + 2 y = -4 | (equation 2)

Express the system in standard form:
{2 x+0 y = 50 | (equation 1)
{x + 2 y = -4 | (equation 2)

Subtract 1/2 × (equation 1) from equation 2:
{2 x+0 y = 50 | (equation 1)
{0 x+2 y = -29 | (equation 2)

Divide equation 1 by 2:
{x+0 y = 25 | (equation 1)
{0 x+2 y = -29 | (equation 2)

Divide equation 2 by 2:
{x+0 y = 25 | (equation 1)
{0 x+y = (-29)/2 | (equation 2)

Collect results:

Answer: {x = 25, y = -29/2
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