SOLUTION: Will you please help me solve for a: 15a-2(4a+5)=-6a

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Question 509700: Will you please help me solve for a: 15a-2(4a+5)=-6a
Answer by josmiceli(9678) About Me  (Show Source):
You can put this solution on YOUR website!
+15a-2%284a%2B5%29=-6a+
+15a+-+8a+-+10+=+-6a+
Add 6a to both sides
+15a+-+8a+%2B+6a+-+10+=+0+
Add 10 to both sides
+15a+-+8a+%2B+6a+=+10+
Do the indicated addition and
subtraction of terms on the left side
+13a+=+10+
+a+=+10%2F13+
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You can check this by putting
answer back into original equation
I'll use decimal equivilant +10%2F13+=+.7692+
+15a-2%284a%2B5%29=-6a+
+15%2A.7692-2%284%2A.7692%2B5%29=-6%2A.7692+
+11.5385+-+2%2A%283.0768+%2B+5%29+=+-4.6152+
+11.5385+-+2%2A8.0768+=+-4.6152+
+11.5385+-+16.1536+=+-4.6152+
+-4.6151+=+-4.6152+
OK- the error must be due to rounding off