Question 187193
{{{6a = 5b + 10}}}
{{{6a - 5b = 10}}}
{{{6a - 5b = 10}}} mult by 5
{{{30a - 25b = 50}}}

{{{8b = 5a + 7}}}
{{{-5a + 8b = 7}}} mult by 6
{{{-30a + 48b = 42}}}

Use elimination
{{{30a - 25b = 50}}}
{{{-30a + 48b = 42}}}  add
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{{{ 23b = 92}}}
{{{b = 4}}}

Now solve for a
{{{6a - 5b = 10}}}
{{{6a - 20 = 10}}}
{{{6a = 30}}}
{{{a = 5}}}

Check your answers!!