5 a + c = − 8 a 5 a + 8 a = − c 13 a = − c a = − 13 c
5 a + c = − 8 a 5 a + c − 5 a = − 8 a − 5 a c = − 13 a − 13 c = − 13 − 13 a − 13 c = a
To solve the equation 5 a + c = − 8 a for a , we first move the terms involving a to one side and isolate a . The solution is a = − 13 c .
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