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arsen [322]
3 years ago
5

Two equations are given below: a – 3b = 9 a = b – 3 What is the solution to the set of equations in the form (a, b)?

Mathematics
2 answers:
ipn [44]3 years ago
8 0
Use substitution and put b-3 where a is in the first equation
Vilka [71]3 years ago
7 0
A-3b=9
a=b-3

b-3-3b=9
-2b-3=9
-2b=12
2b=-12
b=-6

a=-6-3
a=-9

Solution: (-9,-6)
----
Check: 
-9=-6-3
-9=-9
TRUE


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