Answer:
a=1 b=2
Step-by-step explanation:
a+2b=5
3a-b=1
Multiply the second equation by 2
6a-2b=2
Add the two equations together
a+2b=5
6a-2b=2
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7a = 7
Divide by 7
7a/7 = 7/7
a=1
Now find b
3a-b =1
3(1) -b =1
3-b=1
Subtract 3 from each side
3-b-3=1-3
-b = -2
Multiply by -1
b=2
