How to solve system of equations

Question

5a=5
6b-3c=15
2a+7c=-5

Answer 1

from the first
a = 1
replace a with 1 in the third that will give you c
then put the value of c into the 2nd to get b

Answer 2

first we will find the value of a that is a=1 tan we will put the value of a in eq3 to find c so on we wil find b by putting the value of c in eq2.

Answer 3

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