Work Step by Step
$x+y=7$ $8x+19y=100$ $x+y-y=7-y$ $x=7-y$ $x=7-y$ $8x+19y=100$ $8(7-y)+19y = 100$ $56-8y+19y = 100$ $56+11y=100$ $56+11y-56=100-56$ $11y=44$ $11y/11 = 44/11$ $y=4$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.