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Reason: |
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We want to remove the y term. Change signs in the 2nd equation. Multiply the 1st equation by 5. Multiply the 2nd equation by 2. |
| 31x = 93 |
Add the equations. |
| x = 3 |
Divide both sides by 31. |
| 7x + 2y = 25 |
Write the 1st equation. |
| 7(3) + 2y = 25 |
Substitute x with 3. |
| 21 + 2y = 25 |
Remove the brackets by multiplying 7 by 3. |
| 2y = 4 |
Subtract 21 from both sides. |
| y = 2 |
Divide both sides by 2. |