3 years ago

3. Solve the system of equations using linear combination. a + c = 9 8a + 4.5c = 58

Mathematics

2 answers:

sergij07 [2.7K]3 years ago

7 0

A+c=9 so a=9-c
8(9-c)=72-8c+4.5c=58
12.5c=58-72
12.5c=-14
c=-1.12

lana66690 [7]3 years ago

5 0

Hey I have posted a picture the method I use to solve simultaneous equations is change the sign and follow the new sign.
This involves changing the sign for the second equation and solving it

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