Whats The Next Step To This:

Question

2025a+45b=-1.39
324a+18b=1.81

Answer 1

Depends on the method.
For substitution, it could be
2025a + 45(1.81-324a)/18 = =1.39

For elimination, it could be

4050a+90b = -2.78
1620a+90b = 9.05

For any method it could be to reduce the size of the coefficients:

45a+b = -1.39/45
18a+b = 18.1/18