Answer :

mumsy
first we have to eliminate the parenthesis, by multiplying 2 with both numbers
3a+8a-2=9
11a-2=9  we will add 2 on both sides
11a=11 divide by 11
a=1
3a + 2(4a - 1) = 9.

Distributive property.

3a + 8a - 2 = 9

Combine like terms.

11a - 2 = 9

subtract +2 on both sides.

11a - 2 = 9
+2 +2
__________________
11a = 11
/11 /11

a = 1.

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