Question

Solve the equation.

5A+2B=8
9 A+ SB =27​

Answer 1

Answer:

There are three unknown variables, A , B and S. So we need 3 equations. It can't be solved with b2 equations only. I think you have written the S mistakenly.

Answer 2

Step-by-step explanation:

5A + 2B = 8 ---> eq 1

9A + 5B = 27 ---> eq 2

multipy eq 1 by 5 and eq 2 by 2

25A + 10B = 40 ---> eq 3

18A + 10B = 54 ---> eq 4

subtract eq 4 from eq 3

7A = -14

A= -7

B= 43/2

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