Question 669828
Isolate y, the idea is to bring the format into y = mx + b likeness, where b is y intercept.
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3x + 8y = {{{7/5}}}
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Isolate y
8y = -3x + {{{7/5}}}
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Divide both sides by 8
y = {{{-3/8}}}x + {{{(7/5)/8}}}
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Dividing is the same a multiplying the inverse, so
y = {{{-3/8}}}x + {{{(7/5)(1/8)}}}
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therefore, 
y = {{{-3/8}}}x + {{{7/40}}}
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where {{{7/40}}} is the y intercept
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