0
Anonymous
7a-17 = 4a+1
7a-4a = 1+17
3a = 18
a = 6
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-1
9=4a+13 9-13=4a -4=4a -4/4=a -1=a a=-1
A = 6
a is equal to 1.
Add the equations: 4a + 4a - 5b + 5b = 7 + 17 ie 8a = 24 a = 3, so b = 1