Solve 2a5b=-19 3a+5b=9

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asked Sep 2, 2022 70.0k views

2 votes

Solve 2a5b=-19
3a+5b=9

Mathematics
high-school

JimPapas asked

by JimPapas

8.3k points

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1 Answer

4 votes

Answer:

a=28, b=-15

Explanation:

$Method\ by\ linear\ combinaisons\\\left\{\begin{array}c2a+5b&=&-19&-1&3\\3a+5b&=&9&1&-2\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}a&=&28\\5b&=&-75\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}a&=&28\\b&=&-15\\\end{array}\right.\\$

Netdigger answered Sep 6, 2022

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