SOLUTION: Please help me solve this 2 step equation. a/7 + 1/4 = 5/6

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Question 812589: Please help me solve this 2 step equation. a/7 + 1/4 = 5/6
Answer by erica65404(394) About Me  (Show Source):
You can put this solution on YOUR website!
a%2F7+%2B+1%2F4+=+5%2F6
make all the denominators the same

12a%2F84+%2B+21%2F84+=+70%2F84
since all the denominators are the same, multiply the whole equation by that denominator to get rid of it
84%2812a%2F84+%2B+21%2F84%29+=+84%2870%2F84%29
12a+%2B+21+=+84
12a+%2B+21+-+21+=+84+-+21
12a=63
%2812a%29%2F12=63%2F12%0D%0A%7B%7B%7Ba=63%2F12
a=21%2F4